add: air

.gitignore

@@ -1,3 +1,6 @@
+# docker volume
 tmp/cache/data
+tmp/db/data
 
-tmp/db/data
+# golang air
+src/tmp

src/.air.toml

@@ -0,0 +1,46 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp"
+
+[build]
+  args_bin = []
+  bin = "./tmp/main"
+  cmd = "go build -o ./tmp/main ./cmd/main.go"
+  delay = 1000
+  exclude_dir = ["assets", "tmp", "vendor", "testdata"]
+  exclude_file = []
+  exclude_regex = ["_test.go"]
+  exclude_unchanged = false
+  follow_symlink = false
+  full_bin = ""
+  include_dir = []
+  include_ext = ["go", "tpl", "tmpl", "html"]
+  include_file = []
+  kill_delay = "0s"
+  log = "build-errors.log"
+  poll = false
+  poll_interval = 0
+  post_cmd = []
+  pre_cmd = []
+  rerun = false
+  rerun_delay = 500
+  send_interrupt = false
+  stop_on_error = false
+
+[color]
+  app = ""
+  build = "yellow"
+  main = "magenta"
+  runner = "green"
+  watcher = "cyan"
+
+[log]
+  main_only = false
+  time = false
+
+[misc]
+  clean_on_exit = false
+
+[screen]
+  clear_on_rebuild = false
+  keep_scroll = true

src/Dockerfile

@@ -3,9 +3,12 @@ FROM golang:1.22.2-alpine3.18 as dev
 ENV ROOT=/usr/src/app
 WORKDIR ${ROOT}
 
+RUN go install github.com/cosmtrek/air@latest
+
 # pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
 COPY . ./
 RUN go mod download && go mod verify
+
 EXPOSE 8000
 
-CMD ["go", "run", "./cmd/main.go"]
+CMD ["air", "-c", ".air.toml"]