Add recommendation adding a debian/watch for software not coming from Debian

This file will help tracking new upstream versions to package in Apertis.

https://phabricator.apertis.org/T10365

requested review from @wlozano

assigned to @daissi

added 3 commits

• 6773de61 - 1 commit from branch master
• 629398f3 - Add recommendation adding a debian/watch for software not coming from Debian
• bba2dbd8 - Add .hugo_build.lock into .gitignore

Compare with previous version

enabled an automatic merge when the pipeline for bba2dbd8 succeeds

merged