Fix #424: Hide unplayable/emtpy playlists in "Browse playlist" pages

Closes #424

See merge request funkwhale/funkwhale!541

Fix #410: Hide invitation code field during signup when it's not required

Closes #410

See merge request funkwhale/funkwhale!540

Simplify docker deployment

Closes #614

See merge request funkwhale/funkwhale!539

Importer will now pick embedded images in files with OTHER type if no COVER_FRONT is present

See merge request funkwhale/funkwhale!538

Fix #650: Support setting a server URL in settings.json

Closes #650

See merge request funkwhale/funkwhale!537

Fix #610: Use role=button instead of empty links for player controls

Closes #610

See merge request funkwhale/funkwhale!536

Fix #564: Added a script to prune pre 0.17 federated tracks

Closes #564

See merge request funkwhale/funkwhale!535

Fixed #469: parsing of embedded file cover for ogg files tagged with MusicBrainz Picard

Closes #475, #571, and #469

See merge request funkwhale/funkwhale!534

Fix #658: Support blind key rotation in HTTP Signatures

Closes #658

See merge request funkwhale/funkwhale!530

Translations integration

See merge request funkwhale/funkwhale!533

Various spelling

See merge request funkwhale/funkwhale!525

Dependencies update

Closes #657

See merge request funkwhale/funkwhale!531