fix: properly check if shared
fix: return object to view (for get_success_url)
fix: save bounty before attempting to clear/get tags
fix: return bounty to make get_absolute_url work
fix: no need to save SharedBounty again after adding votes (m2m)
chore: Make project more prod. ready by correcting some setting

namely: static files, logging, debug and allowed hosts
tests: Add more objects to fixtures
Update git ignore to ignore collected static files dir
WIP: finish implementing featured bounty creation

This also depends on completion of story #66694712

[Finished #66554500]