HGKeeper

ebc5f568d629

Add a note about downloads and pgp verification to the readme

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.