NodeBB-ActivityPub Bridge Test Instance

@julian Ooo good point about adding the ? back on.

If you're interested in a non-regex solution, here's what I have - https://codeberg.org/rimu/pyfedi/src/branch/main/app/utils.py#L247

@julian PieFed uses the first 150 chars of the first line, but stopping at the first '.' in the first line makes even more sense.