Doc: Resolves #15823: Docker compose template: Don't expose PostgreSQL container port (#15908)

docker-compose.server.yml

@@ -30,8 +30,8 @@ services:
             - ./data/postgres:/var/lib/postgresql/data
         networks:
             - app-network
-        ports:
-            - "5432:5432"
+        # (Optional): Allow accessing the database using an external tool (e.g. `psql`) from the host:
+        # ports: [ "127.0.0.1:5432:5432" ]
         restart: unless-stopped
         environment:
             - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}