Merge branch 'develop' into 'production'

.gitlab-ci.yml

Dockerfile

src/backoffice/locale/de/LC_MESSAGES/django.po

src/backoffice/locale/en/LC_MESSAGES/django.po

src/backoffice/templates/backoffice/assembly_detail.html

src/backoffice/templates/backoffice/assembly_event.html

src/backoffice/templates/backoffice/assembly_room.html

src/backoffice/templates/backoffice/base.html

src/backoffice/templates/backoffice/vouchers-list.html

src/backoffice/urls.py

src/backoffice/views/assemblies.py

src/backoffice/views/pages.py

src/backoffice/views/vouchers.py

src/core/admin.py

src/core/fixtures/rc3_2021.json.gz

src/core/locale/de/LC_MESSAGES/django.po

src/core/locale/en/LC_MESSAGES/django.po

...e_staticpage_unique_conferencestaticpage_slug_and_more.py

src/core/models/pages.py

src/core/translation.py