Useful commands and configuration when working with Docker

Remove Docker containers by tag

I always forget to pass the --rm flag when running command line tools with Docker. This means that I end up with a large history of exited containers that I no longer need.

Using `openvpn-client` with Docker

I recently worked out the correct incantation to get a set of containers to connect to the internet via a VPN using docker-compose. I run it on a QNAP NAS, but it should work on any Linux-like …