fix: update docker-compose configuration and restore backend service

docker-compose.yml

@@ -2,14 +2,23 @@ services:
   frontend:
     container_name: weather-frontend
     build: ./frontend
+    networks:
+      - proxynet
     ports:
       - "7002:80"
-    restart: always
-#  backend:
-#   container_name: backend
-#  build: ./backend
-# ports:
-#  - "7001:7001"
-#volumes:
-#  - ./backend:/bikelane-backend
-# restart: unless-stopped
+    restart: unless-stopped
+
+  backend:
+    container_name: backend
+    build: ./backend
+    networks:
+      - proxynet
+    ports:
+      - "7001:7001"
+    volumes:
+      - ./backend:/bikelane-backend
+    restart: unless-stopped
+
+networks:
+  proxynet:
+    external: true