expose port and add networks

docker-compose.yaml

@@ -10,6 +10,9 @@ services:
       - DB_SERVER=${DB_SERVER}
       - DB_PORT=3306
     container_name: "${BACKEND_CT_NAME:-juhannus-invitation-backend}"
+    networks:
+      - backend
+      - npm
     depends_on:
       - db  # Ensure backend waits for db to start
   db:
@@ -20,12 +23,21 @@ services:
       - MYSQL_DATABASE=${DB_NAME}
     volumes:
       - invitation_db_volume:/var/lib/mysql
+    networks:
+      - backend
   frontend:
     build:
       context: frontend
       dockerfile: Dockerfile
     container_name: "${FRONTEND_CT_NAME:-juhannus-invitation-frontend}"
+    networks:
+      - npm
     depends_on:
       - backend  # Ensure fronetnd waits for backend to start
 volumes:
   invitation_db_volume:
+
+networks:
+  npm:
+    external: true
+  backend: