version: "3.1" services: backend: build: ./src restart: always ports: - "3000:3000" environment: MONGO_URL: mongodb://root:root12345@mongo:27017/ depends_on: mongo: condition: service_started mongo: image: mongo restart: always environment: MONGO_INITDB_ROOT_USERNAME: root MONGO_INITDB_ROOT_PASSWORD: root12345 mongo-express: image: mongo-express restart: always ports: - "8081:8081" environment: ME_CONFIG_MONGODB_ADMINUSERNAME: root ME_CONFIG_MONGODB_ADMINPASSWORD: root12345 ME_CONFIG_MONGODB_URL: mongodb://root:root12345@mongo:27017/