Tagged release v3.20.0

7544486 refactor: defining app config settings using Environment class
96372e5 revert(archivist): revert archivist integration
7556ab6 Revert "Merge branch 'slava/fix_history_post_func' into 'master'"
8f94bb1 add endpoint for registry classification
b21ba1a fix(archive history): add missing argument to _post_history_obj_to_archive
2dfb574 feat(db): integrate with archivist service
85ef4f8 build: Cleanup staled docker artifacts after pipeline finished
4fbb006 build: Integration with pipenv, bump aiohttp, auth, tools version