问Docker编写服务通信

EN

FROM ubuntu:latest
WORKDIR /backend-server
COPY ./static/ ./static
COPY ./config.yml ./config.yml
COPY ./builds/backend-server_linux ./backend-server
EXPOSE 8080
CMD ["./backend-server"]

FROM nginx:stable
WORKDIR /usr/share/nginx/html
COPY ./build .
COPY ./.env .env
EXPOSE 80
CMD  ["sh", "-c", "nginx -g \"daemon off;\""]

version: "3"

services:
    mongo-db:
        image: mongo:4.2.0-bionic
        container_name: mongo-db
        volumes:
            - mongo-data:/data
        network_mode: bridge

    backend:
        image: backend-linux:latest
        container_name: backend
        depends_on:
            - mongo-db
        environment:
            - DATABASE_URL=mongodb://mongo-db:27017
            ..etc
        network_mode: bridge
        # networks: 
        #     - mynetwork
        expose:
            - "8080"
        ports:
            - 8080:8080
        links:
            - mongo-db:mongo-db
        restart: always

    frontend:
        image: frontend-linux:latest
        container_name: frontend
        depends_on:
            - backend
        network_mode: bridge
        links:
            - backend:backend
        ports:
            - 80:80
        restart: always

volumes:
    mongo-data:
        driver: local