Resolve "Secrets get accidentially rotated"

Closes #891

See merge request openappstack/openappstack!472

Merge branch '766-ignore-prometheus-alerts-that-are-always-firing-in-a-single-node-setup' into 'master'

Resolve "Ignore prometheus alerts that are always firing in a single node setup"

Closes #766

See merge request openappstack/openappstack!474

document upgrade procedure (untested) and undo change of prometheus-basic-auth file because it was incorrect

Resolve "NC installation is slow"

Closes #914

See merge request openappstack/openappstack!473

Resolve "Add NC password app"

Closes #906

See merge request openappstack/openappstack!468

Fixes: #914

Resolve "Add NC calendar app"

Closes nextcloud#973 and #905

See merge request openappstack/openappstack!467

TRIGGER_JOBS=enable-nextcloud