docker

Fast one-liner in current dir:
  docker run -v $PWD:$PWD -w $PWD --net=[host|none] image cmd

Verbose docker info:
  docker system df -v

Delete all build cache:
  docker builder prune -af


Docker cache mounts:

Guide:    https://docs.docker.com/build/guide/mounts/#add-a-cache-mount
Syntax:   https://docs.docker.com/reference/dockerfile/#run---mounttypecache
Backends: https://docs.docker.com/build/cache/backends

Executive summary:
The docker driver cache uses the same storage driver as used for image layers.

`docker buildx du --verbose` lists build cache, including cache mounts.
`docker buildx prune` cleans up dangling cache.

`sudo apt install docker-buildx` on Ubuntu since it doesn't get installed by default.