feat: Add a domain alias for caddy (#261)

* feat: Save stoat domain in a .env file and alias Caddy to it internally

This commit was made without the use of generative AI.

Signed-off-by: Jacob Schlecht <dadadah@echoha.us>

* fix: This doesn't work on reverse proxied setups

thanks to @agentflemme for help testing

This commit was made without the use of generative AI.

Signed-off-by: Jacob Schlecht <dadadah@echoha.us>

---------

Signed-off-by: Jacob Schlecht <dadadah@echoha.us>

compose.yml

@@ -70,6 +70,10 @@ services:
       - ./Caddyfile:/etc/caddy/Caddyfile
       - ./data/caddy-data:/data
       - ./data/caddy-config:/config
+    networks:
+      default:
+        aliases:
+         - "${STOAT_DOMAIN:-caddy}"
 
   # API server
   api: