docker-compose.yml

---
services:
  rocketchat:
    container_name: rocketchat
    image: rocketchat/rocket.chat:${RELEASE:-latest}
    # image: rocket.chat:${RELEASE:-latest}
    restart: unless-stopped
    environment:
     - PORT=3000
     - ROOT_URL=https://${DOMAIN}
     - MONGO_URL=mongodb://mongo:27017/rocketchat
     - MONGO_OPLOG_URL=mongodb://mongo:27017/local
     - VIRTUAL_HOST=${DOMAIN}
     - LETSENCRYPT_HOST=${DOMAIN}
     - LETSENCRYPT_EMAIL=${EMAIL}       
    depends_on:
     - mongo
    networks:
     - rocketchat
     - proxy       
  mongo:
    container_name: mongo
    image: mongo:${MONGO_VERSION:-latest}
    restart: unless-stopped
    volumes:
     - ./data/db:/data/db
    command: mongod --oplogSize 128 --replSet rs0 
    labels:
      - "traefik.enable=false"
    networks:
      - rocketchat

  # this container's job is just 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:${MONGO_VERSION:-latest}
    command: >
      bash -c
        "for i in `seq 1 30`; do
            msg=$$(mongosh mongo/rocketchat --quiet --eval \"
            rs.initiate({
              _id: 'rs0',
              members: [ { _id: 0, host: 'mongo:27017' } ]})\" 2>&1)
            s=$$?
            if [ \"$$s\" -eq 0 ]; then
              break
            fi
            if [[ \"$$msg\" == \"MongoServerError: already initialized\" ]] ; then
              echo $$msg
              break
            fi
          echo \"Tried $$i times. Waiting 5 secs...\";
          sleep 5;
        done; (exit 0)"
    depends_on:
      - mongo
    networks:
      - rocketchat

networks:
  rocketchat:
  proxy:
    external: true
    name: http-proxy_proxy