upgrade yaml version to 3 and change postgresql version

standalone/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 # Define named volumes
 volumes:
   caddy_data:
@@ -30,7 +28,7 @@ services:
       - postgres
 
   postgres:
-    image: postgres:13-bullseye
+    image: postgres:${POSTGRES_MAJOR_VERSION:-17}-bullseye
     volumes:
       - postgres_data:/var/lib/postgresql/data
     env_file: docker.env