grim/hgkeeper

Use Alpine for Dockerfile

12 months ago, aklitzing
274e125f308b
Use Alpine for Dockerfile

Also use mercurial from Alpine repository as it is up-to-date and enables
rust extensions and chg binary.

This decreases the size of docker image.

Reviewed at https://reviews.imfreedom.org/r/2454/
This documentation gets deployed to
[docs.imfreedom.org/hgkeeper](https://docs.imfreedom.org/hgkeeper/) via CI.
To build it locally it requires the
[include-markdown](https://github.com/mondeja/mkdocs-include-markdown-plugin)
plugin.