Container restart policies in docker-compose

• "no"
  Never attempt to restart this container if it stops or crashes. It is embraced in quotes, otherwise it will be considered as "false"
• always
  If this container stops "for any reason" automatically attempt to restart it
• on-failure
  Only restart if the container stops with an error code
• unless-stopped
  Always restart unless we (the developers) forcibly stop it

Example:

version: '3'
services:
  redis-server:
    image: 'redis'
  node-app:
    restart: always
    build: .
    ports:
      - "4001:8081"