The following articles provide more in-depth information:
- Use volumes, at http://dockr.ly/2EUjTml
- Manage data in Docker, at http://dockr.ly/2EhBpzD
- Docker volumes on Play with Docker (PWD), at http://bit.ly/2sjIfDj
- nsenter —Linux man page, at https://bit.ly/2MEPG0n
- Set environment variables, at https://dockr.ly/2HxMCjS
- Understanding how ARG and FROM interact, at https://dockr.ly/2OrhZgx