docker-compose.yml

version: '3.7'
services:
    server:
        build: ./server
        restart: always
        container_name: server
        ports:
            - "${SERVER_PORT}:${SERVER_PORT}"
        volumes:
            - ./server:/server
        environment:
            - SERVER_PORT=${SERVER_PORT}
            - MONGO_CONNECTION_STRING=${MONGO_CONNECTION_STRING}
            # script to wait for mongo to be fully up & running
            - WAIT_HOSTS=db:${MONGO_PORT}
        depends_on:
            - db
        restart: on-failure
    db:
        image: mongo:latest
        volumes:
            - $DATABASE_DATA:/$DATABASE_DATA
            # Put the script to initialise the database in the right directory withing mongo container
            # It will execute it on initialisation
            - ./init-db.js:/docker-entrypoint-initdb.d/init-db.js:ro
        environment:
            # to connect from cmd line run (read / write user) for root access use root user
            # mongo --port 27017 -u "user" -p "password" --authenticationDatabase "db"
            # Note : it seems these don't work properly and users are set through the init script 
            # in the volumes section.
            - MONGO_INITDB_DATABASE=${MONGO_INITDB_DATABASE}
            - MONGO_INITDB_ROOT_USERNAME=${MONGO_INITDB_ROOT_USERNAME}
            - MONGO_INITDB_ROOT_PASSWORD=${MONGO_INITDB_ROOT_PASSWORD}
        ports:
            - "${MONGO_PORT}:${MONGO_PORT}"
        restart: on-failure
        expose:
            - ${MONGO_PORT}