v2.9.0

🎄 🎅 🎁 Merry Christmas 🎁🎅 🎄

Features

• Support for domene.shop (#810)
• Support for loopia.se (#842)
• Support for vultr.com (#829)
• Support myaddr.tools (#885)
• Support for namesilo.com (#866)
• Custom provider: allow empty ipv4 and ipv6 keys (see issue #875)
• Possibility to run health server outside Docker and to disable it in a container
  • disable health server if the health listening address:port is empty
  • default health listening address:port to the empty string
  • Docker default health listening address:port to 127.0.0.1:9999

Fixes

• Common update mechanism:
  • do not update if public IP address is within multiple IP addresses resolved
  • IPv6 hostname resolution fixed (it was previously only resolving IPv4)
• Porkbun:
  • update API endpoint (#837)
  • delete default parked DNS entries if needed (#774)
    • delete default @ ALIAS entry when creating a record for the root domain or the wildcard domain
    • delete default * CNAME entry when creating a record for the wildcard domain
• Gandi.net:
  • update API endpoint
  • leave ttl unmodified if the user does not specify it
• DonDominio: wildcard support fixed
• Netcup.de: allow wildcard domains (#863)
• GCP: prevent crash for missing record (#846)
• New file/directory permissions fixed given umask (see #813 for more details)
  • remove bad calculation of "our own" umask
  • remove umask "union effect"
  • do not touch system umask unless UMASK is set
  • set system umask only if UMASK is set
• NoIP: handle response body messages before checking HTTP status code
• Log: use go-chi realip middleware (#874)
• Trim space and lower case all HTTP response 'plain' bodies
• OVH: handling of invalid JSON error bodies fixed
• Aliyun: error context fixed when handling bad request errors

Documentation

• Readme: specify duckdns and goip are handled differently for multiple domains
• GoIP: fix domain field documentation and add domain examples
  • eTLD must be goip.de or goip.it, not eTLD+1
  • remove old domain optional parameter documentation
• DuckDNS: fix domain documentation on eTLD being duckdns.org and add domain examples

Maintenance

Code quality

• do not re-check the owner is not empty within provider specific code
• format code using gofumpt
• Upgrade linter from v1.56.2 to v1.61.0
• add new linters fatcontext, intrange and mirror
• internal/update: use newer LookupNetIP resolver function to use netip.Addr directly

Dependencies

• Upgrade Go from 1.22 to 1.23
• Bump github.com/breml/rootcerts from 0.2.18 to 0.2.19 (#870)
• Bump golang.org/x/net from 0.29.0 to 0.31.0
• Bump github.com/qdm12/gosettings from 0.4.4-rc1 to 0.4.4
• Bump golang.org/x/oauth2 from 0.23.0 to 0.24.0
• Bump golang.org/x/mod from 0.21.0 to 0.22.0
• Bump github.com/go-chi/chi/v5 from 5.1.0 to 5.2.0 (#881)
• Bump github.com/stretchr/testify from 1.9.0 to 1.10.0 (#871)

CI

• Bump DavidAnson/markdownlint-cli2-action from 17 to 18

Development setup

• change field source.organizeImports from true to "always"
• migrate docker-compose.yml settings to devcontainer.json for codespaces support
• update devcontainer readme
• pin qmcgaw/godevcontainer image tag to v0.20-alpine

v2.8.2

Fixes

• Common update mechanism:
  • do not update if public IP address is within multiple IP addresses resolved
  • IPv6 hostname resolution fixed (it was previously only resolving IPv4)
• Porkbun:
  • update API endpoint (#837)
  • delete default parked DNS entries if needed (#774)
    • delete default @ ALIAS entry when creating a record for the root domain or the wildcard domain
    • delete default * CNAME entry when creating a record for the wildcard domain
• Gandi.net:
  • update API endpoint
  • leave ttl unmodified if the user does not specify it
• DonDominio: wildcard support fixed
• Netcup.de: allow wildcard domains (#863)
• GCP: prevent crash for missing record (#846)
• NoIP: handle response body messages before checking HTTP status code
• Trim space and lower case all HTTP response 'plain' bodies
• OVH: handling of invalid JSON error bodies fixed
• Aliyun: error context fixed when handling bad request errors

Documentation

• GoIP: fix domain field documentation
  • eTLD must be goip.de or goip.it, not eTLD+1
  • remove old domain optional parameter documentation
• DuckDNS: fix domain documentation on eTLD being duckdns.org

v2.8.1

Fixes

• New file/directory permissions fixed given umask (see #813 for more details)
  • remove bad calculation of "our own" umask
  • remove umask "union effect"
  • do not touch system umask unless UMASK is set
  • set system umask only if UMASK is set

v2.8.0

Pre-built binaries are attached at the bottom of this release notes in the Assets section. Feel free to 👍 the release!

Features

• Read both domain ("eTLD+1") and owner (aka host) from the domain field
  • retro-compatible change, host or owner field still work if set
  • documentation updated to only use the domain field
• Use umask from operating system to set permissions on created files
• UMASK option to configure a custom umask value to use

Fixes

• PublicIP HTTP echo: remove google provider which no longer works
• Porkbun:
  • remove trailing '.' from ALIAS delete API call (#775)
  • fix wildcard behavior (#773)
• noip: force useProviderIP to false when using IPv6
• Don Dominio: remove unneeded name field
• Upgrade github.com/qdm12/gosettings from v0.4.1 to v0.4.4-rc1
• Bump github.com/breml/rootcerts from 0.2.17 to 0.2.18 (#814)

Changes

• Deprecate provider_ip config field completely
  • change should not affect any existing configurations
  • change solves issues with dual stack updates (#767)
  • this option was unneeded and added unneeded complexity

Documentation

• Readme: add instructions to build latest binary
• Documentation updated to only use the domain field for both the domain and owner/host.
• Readme: add README.md and docs/ versioned links for each recent releases
• Readme: add AUR package name to features list section
• Goip: fix documentation for the host parameter field
• OVH: link to page to retrieve the consumer_key value
• Porkbun: fix discrepancy in parameter field names
• Readme: remove outdated Kanban Github board link

Maintenance

Code health

• Rename cmd/updater to cmd/ddns-updater to have binaries named as ddns-updater by default
• internal/providers:
  • split out settings validation in its own pure function
  • move domain check to each provider validation function
  • typo 'agend' fixed to 'agent' in user agent banned error (#790)
• internal/models: remove unused DomainHost struct
• rename host to owner
  • Retro-compatible change, host field still works
  • Code updated to use owner variable name
• internal/providers/porkbun: refactor API code to use a generic httpPost function
• internal/persistence/json: change mutex to be non embedded in Database struct
• CI: ignore duckdns.org for links check

Dependencies

• Drop dependency on github.com/chmike/domain
• Bump golang.org/x/net from 0.26.0 to 0.29.0 (#806)
• Bump golang.org/x/oauth2 from 0.21.0 to 0.23.0 (#802)
• Bump github.com/qdm12/gosplash from 0.1.0 to 0.2.0 (#783)
• Bump github.com/miekg/dns from 1.1.61 to 1.1.62 (#815)
• Bump golang.org/x/mod from 0.18.0 to 0.21.0 (#801)
• Bump github.com/go-chi/chi/v5 from 5.0.12 to 5.1.0 (#755)
• Upgrade temporary build image Alpine from 3.19 to 3.20
• Bump docker/build-push-action from 5 to 6 (#747)
• Bump DavidAnson/markdownlint-cli2-action from 16 to 17 (#811)

v2.7.1

ℹ️ This is a bugfix release built with fixes only on top of the v2.7.0 program

Fixes

• publicip/http: remove google provider which no longer works
• Porkbun: fix wildcard behavior and alias deletion
• Noip: force useProviderIP to false for IPv6
• Don Dominio: remove unneeded name field

Documentation fixes

• readme: add readme and docs/ versioned links
• goip: fix documentation for the host field

Other minor fixes

• Upgrade github.com/qdm12/gosettings from v0.4.1 to v0.4.4-rc1
• Upgrade github.com/breml/rootcerts from 0.2.17 to 0.2.18
• CI: ignore duckdns.org for links check

v2.6.1

⚠️ You might want to use release v2.7.0 which is below (due to the last commit time being before)

ℹ️ This is a bugfix release built with fixes only on top of the v2.6.0 program

Fixes

• custom: url building fixed ⚠️
• Web UI: IPs chronological order fixed (reverse) 🖱️
• IP echo: allow custom urls for http ip providers
• inwx: allow wildcard hosts
• ionos: wildcard handling
• name.com
  • update root domain record fixed
  • detect existing root domain records
• noip
  • IPv6 handling fixed
  • handle useproviderip set to true correctly
• porkbun: wildcard update fixed

v2.7.0

Pre-built binaries are attached at the bottom of this release notes in the Assets section. Feel free to 👍 the release!

Features

• Web UI: improvements and fixes (#687)
• changeip.com support
• route53 simple routing support (#715)
• CONFIG_FILEPATH (or --config-filepath) option to specify a configuration file path
• healthchecks.io
  • fail and exit codes support
  • HEALTH_HEALTHCHECKSIO_BASE_URL option
• container: /updater/data built-in with correct ownership (#634)
• publicip/http:
  • add multiple providers for all IP versions: icanhazip, ident, nnev, wtfismyip, seeip.org
  • add changeip for ipv4orv6
• publicip/info: add ip2location.io provider
• SERVER_ENABLED option defaulting to yes
• Print version when the first argument is version, -version or --version
• server: serve root at /rooturl on top of /rooturl/
• validate domain strings for providers using it (#638)

Fixes

See v2.6.1 for fixes incorporated in this release compared to v2.6.0

• container: rename /updater/app to /updater/ddns-updater so it can easily be found in running processes (see #729)
• health server: only run it when running in a container
• trim spaces from each "host" value
• cloudflare: prevent empty "key" value if "email" is set
• godaddy: link to comment when status code 403 is received
• ovh: add no host case handling

Documentation

• readme: update for standalone binaries
  • update description and title to be generic and non-specific to containers
  • describe availability as container image and prebuilt binaries
  • split features in subsections
• readme: fix public ip echo custom url prefix url:https:// instead of https://
• readme: RESOLVER_ADDRESS description improved
• readme: HEALTH_HEALTHCHECKSIO_UUID description improved
• readme: reference Qnap setup guide (issue #708)
• readme: better explain container directory and file creation
• readme: fix missing allinkl document link
• contributing document with example provider
  • add example provider in code and docs/example.md
  • merge contributing guides together
  • add contributing section on adding a new provider
• contributing: change 'remote containers extension' to new 'dev containers extension' (#696)
• devcontainer: change 'remote containers extension' to new 'dev containers extension'
• docs/infomaniak.md: add missing details and guide (#677)
• docs/: fix typo identifiersuffix -> identifier suffix

Maintenance

Coding

• migrate to service architecture with github.com/qdm12/goservices (#743)
• porkbun: add context to top level errors
• linter
  • remove invalid configuration file fields
  • add multiple linters
• cloudflare: unexport createRecord method
• public ip: better error messages stating the provider type if unknown
• cmd/updater: split main function into smaller functions
• gcp: validate credentials JSON object has "type" field
• change ttl type from int/uint/int32 to uint32

Dependencies

• drop Google SDK dependency
  • depend only on golang.org/x/oauth2
  • reduce program size from 17MB to 11.5MB
• bump github.com/qdm12/gosettings from 0.4.0-rc9 to 0.4.1 (#683)
• bump github.com/breml/rootcerts from 0.2.14 to 0.2.17 (#612, #631, #741)
• bump github.com/miekg/dns from 1.1.57 to 1.1.61 (#600, #745)
• bump golang.org/x/mod from 0.14.0 to 0.18.0 (#637, #736)
• bump github.com/go-chi/chi/v5 from 5.0.11 to 5.0.12 (#654)
• bump github.com/stretchr/testify from 1.8.4 to 1.9.0 (#662)
• Upgrade Go from 1.21 to 1.22

CI

• bump actions/checkout from 3 to 4 (#599)
• bump actions/setup-go from 2 to 5 (#630)
• bump crazy-max/ghaction-github-labeler from 4 to 5 (#596)
• bump DavidAnson/markdownlint-cli2-action from 14 to 16 (#629, #688)
• bump docker/login-action from 2 to 3 (#597)
• bump docker/setup-qemu-action from 2 to 3 (#584)
• bump golangci-lint to v1.56.2
• bump goreleaser/goreleaser-action from 5 to 6 (#737)
• bump peter-evans/dockerhub-description from 3 to 4 (#610)
• pin docker/build-push-action to v5

v2.6.0

Features

• Support CLI flags 🎏 (equivalent to environment variable names)
• Automated binaries releasing on GitHub for commonly used platforms
• IPv6: add JSON parameter ipv6_suffix and deprecate IPV6_PREFIX (retro-compatible change) (#611)
• Public IP fetching 📥
  • DNS fetching uses DNS over TLS (DoT) only 🔒, google removed due to no support for DoT
  • Ipify support for HTTP "IPv4 or IPv6" fetching
  • Remove NoIP HTTP option (only plaintext HTTP fetching)
  • Add Spdyn for HTTP IPv4 or IPv6 fetching
  • Add ipleak for all HTTP modes
• Existing providers features ♻️
  • DonDominio: add support for subdomains and wildcard host values
  • Porkbun: json decode error messages for log messages
• Custom provider ✏️ (bugged, fixed in next release v2.7.0)
  • Sends HTTP GET request to url given with ip information
  • Configurable ipv4 and ipv6 query parameter keys
  • Configurable response success detection with a regex
  • Treat non status OK 200 responses as failures
• 🆕 Providers
  • desec (#496)
  • easydns (#480)
  • goip.de (#623)
  • hetzner (#503)
  • ionos
  • name.com (#474)
  • netcup.de (#361)
  • nowdns (#504)
  • zoneedit.com (#482)
• Shoutrrr 📢
  • Bumped from v0.7.0 to v0.8.0
  • Add SHOUTRRR_DEFAULT_TITLE, disable SHOUTRRR_PARAMS and only add &title= parameter to shoutrrr address if it's not set in the address already
• healthchecks.io support with configuration option HEALTH_HEALTHCHECKSIO_UUID 🩺
• Logging 📜
  • Log tree of settings at start
  • Shoutrrr debug logs
  • "IPv6 is not supported on this system" logged if all IP fetching tries fail with an IPv6 error
  • Reduce log spamming: log each IP fetching error at the debug level and log them all at the error level in a single line, if all the fetching tries fail.
• LISTENING_ADDRESS configuration key (#590) to replace LISTENING_PORT (retro-compatible change) 👂
• Docker images tags are now with and without the v prefix. For example :v2.6.0 and :2.6.0 🤷
• internal/config: append :53 to the resolver address if no port is given
• More exact times for state updates, events and ban time checking 🕙

Fixes

• Core updating mechanism
  • Get database events by IP version (#514)
  • Skip update if public IP is not found
  • Do not save invalid IP if the public IP is not found
  • Set initial fail status if the public ip fetching failed
• Public IP fetching
  • IPv6: replace bad regex with custom IPv6 extract function, affects allinkl, dnsomatic, google, he and noip
  • Remove plaintext HTTP option noip
  • over HTTPs:
    • use address of Cloudflare for "ipv4 or ipv6"
    • remove opendns option
  • over DNS: add opendns option
• Provider specific fixes
  • Desec:
    • default host to "@" if empty
    • allow wildcard hosts
  • DNSOMatic:
    • remove username validation regex
    • treat 'all' host as proxied to reduce updates, and does the IP comparison using the last IP stored in updates.json.
  • DonDominio: update code to use newer https://dondns.dondominio.com/json endpoint
  • DuckDNS:
    • send ip address if "provider_ip": false
    • support for IPv6 (#542)
  • Dyn: always give myip= parameter, provider_ip setting disabled
  • Dynv6: set url ip field as 'auto' when "provider_ip": true (#549)
  • DynDNS: allow wildcard hosts
  • Gandi: personal access token support (#568)
  • Google: removed since no longer functional
  • Infomaniak: handle new response prefixes
  • Inwx: fix success codes detection
  • Njalla: do not compare ip received when using "provider_ip": true
  • Noip: do not check for received IP when using "provider_ip": true
  • OpenDNS: IP received comparison check fixed
  • Porkbun: delete ALIAS record before creating an A or AAAA record
  • Spdyn: validate the host field value even if the token is set
• Web UI
  • Fix the ipinfo.io link for the current ip (#529)
  • Include ip version for all providers (#512)
  • Href link to the favicon fixed
• Bump HTTP timeout from 10s to 20s due to slow NoIP servers
• Logging:
  • correct IP version for the "ipv4 no lookup" log line
  • IPv4 only and IPv6 only debug logging (#513)
  • Creation date set correctly by CI
• Settings:
  • Ignore echo services absent from PUBLICIP_FETCHERS
  • Web UI listening port validation:
    • Check start of unprivileged ports on Linux
    • Check if running program has bind capability on Linux

Documentation

• Readme:
  • Fix documentation for SHOUTRRR_DEFAULT_TITLE
  • Fix all dead links
  • Fix shoutrrr bad link (#609)
  • Remove outdated ddnss http public ip fetching
  • Use relative links, now compatible with Docker Hub description sync job
• docs/ directory:
  • fix all dead links
  • cloudflare: wildcard hosts are allowed
  • gcp: fix typo for provider name (#465)
  • dnsomatic: fix settings fields (#463)
  • infomaniak: add missing username field in example (#467)
  • opendns: fix bad provider name dyn to opendns in example (#470)
  • noip: add missing username field in example (#469)
  • inwx:
    • fix bad provider name opendns -> inwx (#468)
    • remove trail comma in JSON example
  • add missing provider_ip field in examples (#466)
  • add missing ip_version parameter for allinkl, name.com, netcup and porkbun
  • update ip_version description for all providers
  • nowdns:
    • add missing ip_version parameter
    • remove trail comma in JSON example
• Add Kubernetes examples & documentation (#402)
• Github:
  • Update all labels
  • More explicit title requirement in issue templates
  • Remove automated @qdm12 assignee
• Fix typos (#532)

Maintenance

CI

• Add markdown workflow
  • Remove docker hub description workflow
  • Build workflow ignores md files for spellcheck
• Add goreleaser steps to build and attach binaries on release
• Bump linter golangci-lint from v1.52.2 to v1.55.2
• Add mocks check step
• Force matching Shoutrrr link with go.mod shoutrrr version (#491)
• Add dependabot configuration
• Add build-skip workflow for required workflows
• Bump github/codeql-action from 2 to 3 (#583)
• Bump docker/setup-buildx-action from 2 to 3 (#587)
• Bump docker/metadata-action from 4 to 5 (#585)
• Bump docker/build-push-action from 4.0.0 to 5.1.0 (#582)

Dependencies

• Remove dependency on golang.org/x/net
• Bump breml/rootcerts from v0.2.11 to v0.2.14
• Bump github.com/miekg/dns from v1.1.42 to v1.1.57
• Bump golang.org/x/net from v0.1.0 to v0.17.0 (#540)
• Bump chi from v1.5.4 to v5.0.11
• Bump Go from 1.20 to 1.21
• Bump Alpine from 3.18 to 3.19
• Bump google.golang.org/grpc from 1.50.1 to 1.56.3 (#552)
• Bump github.com/stretchr/testify from v1.8.1 to v1.8.4
• Bump golang.org/x/mod from v0.12.0 to v0.14.0

Code

• Dockerfile:
  • Remove outdated SHOUTRRR_DEFAULT_TITLE
  • Add HEALTH_SERVER_ADDRESS=127.0.0.1:9999
• Migrate from net.IP* to net/netip.Addr and net/netip.Prefix
• Drop github.com/qdm12/golibs dependency
  • internal/persistence/json: drop dependency on golibs
  • pkg/publicip/info: remove dependency on golibs
  • cmd/updater: replace golibs/connectivity with internal/health's CheckHTTP function
  • internal/settings: remove dependency on qdm12/golibs/verification
• Configuration reading reworked to use qdm12/gosettings@v0.4.0-rc9
• pkg/publicip/dns: set dial timeout as the value of the parent fetcher timeout
• Namecheap: make code only IPv4 compatible
• Servercow: use injected domain instead of re-decoding it from JSON
• internal/update:
  • simplify shouldUpdateRecord functions shouldUpdateRecordNoLookup and shouldUpdateRecordWithLookup
  • simplify log calls
  • rename run.go to service.go
• persistence/json:
  • simplify StoreNewIP method
  • improve data check error messages
• internal/data: remove unused GetEvents method
• internal/models: remove unneeded HTML string alias type
• OVH: remove unneeded sentinel errors
• internal/provider/providers:
  • replace ip nil check with useProviderIP check (affects duckdns, infomaniak and namecheap)
  • review HTTP headers: add missing header(s), remove unneeded headers
  • review error wrappings for client.Do and wrap using string doing http request
  • review error wrappings for validation errors
  • Use errors.BadRequest for badrequest responses only
  • Change HTTP request creation error wrappings to be a string only
  • Add missing HTTP request creation error wrappings
  • remove intermediary errors and wrap them with strings instead of other sentinel errors
• internal/provider/errors: review update errors and wrappings
  • ErrBadHTTPStatus -> ErrHTTPStatusNotValid
  • ErrNumberOfResultsReceived -> ErrResultsCountReceived
  • ErrNoResultReceived -> ErrReceivedNoResult
  • ErrAbuse -> ErrBannedAbuse
  • ErrInvalidSystemParam -> ErrSystemParamNotValid
  • ErrNoIPInResponse -> ErrReceivedNoIP
  • ErrUnsuccessfulResponse -> ErrUnsuccessful
  • Remove ErrRequestEncode and ErrRequestMarshal and wrap errors with string instead
  • Remove ErrUnmarshalResponse and wrap errors with string instead
  • Add ErrResponseTooShort - Remove ErrNotFound and replace with more precise not found errors
  • Add ErrRecordResourceSetNotFound error
  • Sort errors list alphabetically
  • Change Empty -> NotSet
  • Change Malformed -> NotValid
• internal/shoutrrr new package
• .gitignore: fix /data path

Note: re-released as v2.6.0 to have permissions fixed for goreleaser to work (c338c28)

v2.5.0

Features

• 🆕 providers
  • Aliyun (#252, #253)
  • all-inkl.com (#309)
  • dynu.com (#285)
  • GCP (#337, #405)
  • inwx (#379, #473)
  • Porkbun (#217)
  • Servercow (#224)
• Shoutrrr library update to v0.7.0
• Cloudflare: create record if it does not exist (#477)
• DNSPod: log entire JSON response on error
• Dreamhost: allow to specify a custom host
• Specify resolver address with the RESOLVER_ADDRESS environment variable
• Specify resolver timeout with the RESOLVER_TIMEOUT environment variable
• Retry getting IP address up to 3 times
• Use github.com/breml/rootcerts v0.2.11 for TLS certs
• Add destination to notification errors
• Add GHCR registry image (#259)
• pkg/publicip/info package (#189)
• pkg/publicip: do not use providers banning us

Fixes

• Cloudflare:
  • key -> userServiceKey variable name (#462)
  • fix service key regex
• dd24:
  • API call and fix (#236)
  • Handle non-empty responses
• ddnss.de add dual_stack parameter (#270, thanks @quantum-byte)
• DNSOMatic:
  • allow email addresses as user field
  • remove password regex check
• DNSPod add IPv6 record ID finder
• FreeDNS fix no ip change messages decoding
• Linode fix error decoding and set name field when creating record
• LuaDNS match configured host instead of first record (#249)
• Namecheap XML decoding error & allow empty IP field in response
• OVH:
  • fix signature in api mode
  • support nochg responses
• Spdyn response handling for good and nochg
• SHOUTRRR_ADDRESSES case sensitivity fixed
• Write JSON file from CONFIG variable
• DNS public IP fetching timeout fixed
• Better error messages for JSON decoding errors
• Shoutrrr validation error wrapping

Maintenance

• Fix line endings to lf (#220)
• Remove microbadger which went EOL
• Remove unneeded /tmp/data directory in Dockerfile
• Use github.com/qdm12/gosplash for program start log information
• Update .devcontainer definition files and readme

Code health

• General refactoring involving:
  • Return concrete structs instead of interfaces
  • Accept locally defined interfaces as narrow as possible
  • Export returned struct types from exported functions
  • Do not export interfaces for other packages to use
• Define and use sentinel errors
• Wrap all sentinel errors
• Use string comparisons instead of length for string variables
• Remove short if error checks
• Interface composition for Database
• HTTP client logger middleware
• internal/backup package refactor
• internal/health: remove unneeded logger argument from functions
• internal/settings/*: validate using local regexes
• internal/settings/dyn: change JSON field tag from password to client_key (with retro-compatibility)
• internal/settings/providers/dyn: more information on bad request error
• internal/settings/providers/ovh: Add error context to errors
• internal/settings/providers: rework IP string search code
• Change database id to be uint instead of int
• Remove GetAllDomainsHosts database method
• Return string instead of error when appropriate (linode)

Linting

• Upgrade golangci-lint from v1.41.1 to v1.52.2
• Enable all default linters
• Add linters and fix new errors: ireturn, revive, asasalint, bidichk, containedctx, cyclop, decorder, durationcheck, errchkjson, errname, errorlint, execinquery, forcetypeassert, gomoddirectives, grouper, interfacebloat, maintidx, makezero, nilnil, nosprintfhostport, promlinter, reassign, tenv, usestdlibvars, goerr113, dupword. paralleltest, musttag, gocheckcompilerdirectives
• Remove deprecated linters: deadcode, structcheck and varcheck
• Update exclude rules

Build

• Upgrade Go from 1.16 to 1.20
• Remove unneeded alpine tzdata package
• Upgraded Alpine from 3.13 to 3.18

CI

• Allow slash in branch name for docker image tags (#219)
• Remove go modules tidy check
• Add UID and GID build arguments
• Bump GitHub actions versions (#353)
• Restrict publish image trigger events

Dependencies

• Use github.com/qdm12/log instead of logger from github.com/qdm12/golibs
• Upgrade qdm12/goshutdown from v0.1.0 to v0.3.0
• Upgrade github.com/qdm12/golibs
  • Wrap errors in config package with environment variable name
  • Update logger

Documentation

• Fix links in .github/CONTRIBUTING.md

Readme

• Document RESOLVER_ADDRESS environment variable
• Add Build the image section
• Clarify how to use another user ID for the container
• Rework metadata badges
• Fix lint errors
• Remove sanitize query parameter from svg tag
• Autoformat document

./docs

• Cloudflare:
  • host parameter should be @
  • remove unneeded steps (#363)
• DuckDNS: fix provider_ip not for ipv6
• Dyn: change JSON field from password to client_key (with retro-compatibility)
• FreeDNS: add domain setup section (#238)
• Gandi: fix JSON example syntax (#362)
• Google: fix JSON example (#223)

v2.4.1

• Fix: SHOUTRRR_ADDRESSES case sensitivity