docker-compose.yml

version: "3.1"
services:
        db:
                image: mongo
                restart: always
                networks:
                        - web_network
                environment:
                        MONGO_INITDB_ROOT_USERNAME: $DB_USERNAME
                        MONGO_INITDB_ROOT_PASSWORD: $DB_PASSWORD
                        MONGO_INITDB_DATABASE: $MONGO_INITDB_DATABASE
                ports:
                        - 27017:27017
                volumes:
                        - ./db_vol:/data/db

        db-interface:
                image: mongo-express
                restart: always
                environment:
                        ME_CONFIG_MONGODB_ADMINUSERNAME: $DB_USERNAME
                        ME_CONFIG_MONGODB_ADMINPASSWORD: $DB_PASSWORD
                        ME_CONFIG_MONGODB_PORT: 27017
                        ME_CONFIG_MONGODB_SERVER: db
                ports:
                        - 8081:8081
                networks:
                        - web_network # access the interface
                depends_on:
                        - db

        app:
                build: ./backend
                restart: always
                volumes:
                        - ./backend:/app
                environment:
                        PORT: 8080
                        DEBUG: $DEBUG
                        SECRET_KEY: $SECRET_KEY
                        DATABASE_URL: $DATABASE_URL
                ports:
                        - 8080:8080
                depends_on:
                        - db
                networks:
                        - web_network # for web API

networks:
        web_network:
            driver: bridge

volumes:
        web-root:
        db_vol: