Script for creating Debian package

Needed it simplify deployment. Maybe could be of use for someone else, don't know.
I think you intend the `|| echo ""` to prevent the `set -o errexit` from causing this to be a fatal error for the script. First, you need not supply an empty argument to `echo`, it's equivalent to no arguments. Second, you can just use `true`, it's a more direct way of providing an alternate success exit code, without any side-effects.