Rocket.Chat docker-compose file to develop Apps

docker-compose.yml

version: "3.0"

services:
  rocketchat:
    image: rocketchat/rocket.chat:3.16.2
    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:
      - ./uploads:/app/uploads
    environment:
      - PORT=3000
      - ROOT_URL=http://localhost:3000
      - MONGO_URL=mongodb://mongo:27017/rocketchat
      - MONGO_OPLOG_URL=mongodb://mongo:27017/local
      - ADMIN_USERNAME=rocket
      - ADMIN_PASS=PZxs7wsHWEJLP98z
      - ADMIN_EMAIL=admin@rocketchat.local
    depends_on:
      - mongo
    ports:
      - 3000:3000

  mongo:
    image: mongo:4.0
    restart: unless-stopped
    volumes:
     - ./data/db:/data/db
     - ./data/dump:/dump
    command: mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1

  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