rocket.chat 3.4.1 / let's chat docker-compose sample

docker-compose.yml

version: "3"
services:
    letschat:
        image: sdelements/lets-chat
        # image: lets-chat:2020-07-08
        links:
            - mongo
        ports:
            - 8080:8080

    rocketchat:
        image: rocketchat/rocket.chat:latest
        environment:
            - PORT=3000
            # - MAIL_URL=
            - MONGO_URL=mongodb://mongo:27017/rocketchat
            - MONGO_OPLOG_URL=mongodb://mongo:27017/local
            - Accounts_UseDNSDomainCheck=false
        links:
            - mongo
        restart: unless-stopped
        ports:
            - 3000:3000
    mongo:
        image: mongo:3.6.13
        restart: unless-stopped
        command: mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1
        volumes:
            - ./data/runtime/db:/data/db
            - ./data/dump:/dump
       
    # this container's job is just to run the command to initialize the replica set.
    # it will run the command and remove himself (it will not stay running)
    mongo-init-replica:
        image: mongo:3.6.13
        command: >
                bash -c
                    "for i in `seq 1 30`; do
                    mongo mongo/rocketchat --eval \"
                        rs.initiate({
                        _id: 'rs0',
                        members: [ { _id: 0, host: 'localhost:27017' } ]})\" &&
                    s=$$? && break || s=$$?;
                    echo \"Tried $$i times. Waiting 5 secs...\";
                    sleep 5;
                    done; (exit $$s)"
        depends_on:
            - mongo