fix: update metamcp image version and clean up environment variable syntax

templates/compose/metamcp.yaml

@@ -8,7 +8,7 @@
 services:
   app:
     container_name: metamcp
-    image: 'ghcr.io/metatool-ai/metamcp:latest'
+    image: 'ghcr.io/metatool-ai/metamcp:2.4'
     environment:
       - SERVICE_URL_METAMCP_12008
       - POSTGRES_HOST=${POSTGRES_HOST:-postgres}
@@ -18,9 +18,9 @@ services:
       - POSTGRES_DB=${POSTGRES_DB:-metamcp_db}
       - DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}'
       - APP_URL=$SERVICE_URL_METAMCP
-      - 'NEXT_PUBLIC_APP_URL=${APP_URL}'
+      - NEXT_PUBLIC_APP_URL=${APP_URL}
       - BETTER_AUTH_SECRET=$SERVICE_PASSWORD_AUTH
-      - 'TRANSFORM_LOCALHOST_TO_DOCKER_INTERNAL=${TRANSFORM_LOCALHOST_TO_DOCKER_INTERNAL:?true}'
+      - TRANSFORM_LOCALHOST_TO_DOCKER_INTERNAL=${TRANSFORM_LOCALHOST_TO_DOCKER_INTERNAL:?true}
     depends_on:
       postgres:
         condition: service_healthy