A simple docker-compose.yaml file for create on-prem Rocketchat server.

rocketchat-docker-compose.yaml

version: '2'

services:
  rocketchat:
    image: registry.rocket.chat/rocketchat/rocket.chat:latest
    command: >
      bash -c
        "for i in `seq 1 30`; do
          node main.js &&
          s=$$? && break || s=$$?;
          echo \"Tried $$i times. Waiting 5 secs...\";
          sleep 5;
        done; (exit $$s)"
    restart: unless-stopped
    volumes:
      - ./volumes/uploads:/app/uploads
    environment:
      - PORT=3000
      - ROOT_URL=http://localhost:3000
      - MONGO_URL=mongodb://mongo:27017/rocketchat
      - MONGO_OPLOG_URL=mongodb://mongo:27017/local
      - REG_TOKEN=VERYSECRETVERYSECRETVERYSECRET
#       - MAIL_URL=smtp://smtp.email
#       - HTTP_PROXY=http://proxy.domain.com
#       - HTTPS_PROXY=http://proxy.domain.com
    depends_on:
      - mongo
    ports:
      - 3000:3000
    labels:
      - "traefik.backend=rocketchat"
      - "traefik.frontend.rule=Host: your.domain.tld"

  mongo:
    image: mongo:4.0
    restart: unless-stopped
    volumes:
     - ./volumes/mongo/data/db:/data/db
     #- ./data/dump:/dump
    command: mongod --smallfiles --oplogSize 128 --replSet rs0
    labels:
      - "traefik.enable=false"

  # 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:4.0
    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

  #traefik:
  #  image: traefik:latest
  #  restart: unless-stopped
  #  command: >
  #    traefik
  #     --docker
  #     --acme=true
  #     --acme.domains='your.domain.tld'
  #     --acme.email='[email protected]'
  #     --acme.entrypoint=https
  #     --acme.storagefile=acme.json
  #     --defaultentrypoints=http
  #     --defaultentrypoints=https
  #     --entryPoints='Name:http Address::80 Redirect.EntryPoint:https'
  #     --entryPoints='Name:https Address::443 TLS.Certificates:'
  #  ports:
  #    - 80:80
  #    - 443:443
  #  volumes:
  #    - /var/run/docker.sock:/var/run/docker.sock