This is my private docker container for running neomutt, notmuchmail, afew, taskwarrior and notmuchtask on homebrew.
Unfortunately it is neigh to impossible to install the notmuch python bindings via homebrew. So the solution was to put it in a Docker container.
Config files and dirs are mounted into the container.
The entry point transparently creates a user/group named user with the uid/gid of 1000 in order to use the correct user ids for file access.
uid and gid can be overridden by passing the environment variables USER_ID and GROUP_ID (see run-container) to docker (e.g. docker run -e USER_ID=9999 -e GROUP_ID=1234 mailenv).