~donmcc/astr

ref: 0bdc6c0c61147a066982553e0a47896062f3deaa astr/.builds/debian_stable.yml -rw-r--r-- 340 bytes
Added build trigger to send email on failure.
Adding missing `cd` to fix build task.
Added build file for Debian stable.

Created `.builds` directory for `builds.sr.ht` and added Debian stable
build definition.