chore(backend): update template to v0.4.0

backend/docker-compose.override.yml.example

@@ -5,10 +5,12 @@ services:
       caddy:
         aliases:
           - beavergram-api
+#    ports:
+#      - "127.0.0.1:8080:${API__PORT}"
 
   postgres:
-    ports:
-      - "127.0.0.1:${DB__PORT:-5432}:5432"
+#    ports:
+#      - "127.0.0.1:5432:${DB__PORT}"
 
 networks:
   caddy: