Update's mailerPasswordFile to secrets.mailer.PASSWD and removes our
custom overlay as it was already merged into current nixpkgs
Change-Id: Ic2c8079094fdd93a3350a35f6dbdd67465cee1da
Reviewed-on: #9
Co-authored-by: Samuel Shuert <me@thecoded.prof>
Co-committed-by: Samuel Shuert <me@thecoded.prof>
https://reuse.software is a way of specifying licenses in a simple way
that easily allows us to specify multiple licenses in a project and
check that we are correctly specifying our licenses
We plan to add an MIT-licensed file to the project in a future commit,
which prompted us to look at REUSE to make this simpler