Reorganise the docker configuration page a little

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

docs/docker/configuration.md

@@ -20,21 +20,36 @@ To set a specific password for the web interface, use the environment variable `
 - Supports non-standard ports with #[port number] e.g `127.0.0.1#5053;8.8.8.8;8.8.4.4`
 - Supports Docker service names and links instead of IPs e.g `upstream0;upstream1` where upstream0 and upstream1 are the service names of or links to docker services
 
-### Optional Variables
+### Configuring FTL Via The Environment
 
-#### `FTLCONF_[SETTING]`
+While FTL's configuration file can be manually edited, set via the CLI (`pihole-FTL --config setting.name=value`), or set via the web interface - the recommended approach is to do this via environment variables
 
-Set various `pihole.toml` settings via environment variable for persistence. Follows the syntax as setting a value on the CLI, e.g `pihole-FTL --config key.setting=value`. Replace `.` with `_` in the setting name, and prepend with `FTLCONF_`
+As with the recommended examples above for the web password and DNS upstreams, the syntax is `FTLCONF_[section_][setting]`
 
-For example, setting `FTLCONF_dns_dnssec: 'true'` is the functional equivalent of running `pihole-FTL --config dns.dnssec=true`, or setting the following in the toml file
+Given the below `toml` formatted example from `pihole.toml`, we can translate this to the environment variable `FTLCONF_dns_dnssec`
 
 ```toml
 [dns]
   dnssec = true
 ```
 
-!!! info
-    FTL settings that are set via environment variables effectively become read-only, meaning that you will not be able to change them via the web interface or CLI. This is to ensure a "single source of truth" on the config. If you later unset or remove an environment variable, then FTL will revert to the default value for that setting
+!!! note
+    All FTL settings that are set via environment variables effectively become read-only, meaning that you will not be able to change them via the web interface or CLI. This is to ensure a "single source of truth" on the config. If you later unset or remove an environment variable, then FTL will revert to the default value for that setting
+
+
+An example of how some of these variables may look in your compose file
+
+```yaml
+    environment:
+      TZ: europe/London
+      FTLCONF_dns_revServers: 'true,192.168.0.0/16,192.168.0.1,lan'
+      FTLCONF_dns_upstreams: '8.8.8.8;8.8.4.4'
+      FTLCONF_webserver_api_password: 'correct horse battery staple'
+      FTLCONF_webserver_port: '8082,443s'
+      FTLCONF_debug_api: 'true'
+```
+
+### Other Variables
 
 #### `TAIL_FTL_LOG` (Default: `1`)
 
@@ -51,8 +66,6 @@ Overrides image's default pihole group id to match a host group id
 !!! Warning
     For the above two settings, the `id` must not already be in use inside the container!
 
-### Advanced Variables
-
 #### `FTL_CMD` (Default: `no-daemon`)
 
 Customize the options with which dnsmasq gets started. e.g. `no-daemon -- --dns-forward-max 300` to increase max. number of concurrent dns queries on high load setups.