Resolve "Release version 0.8"

Closes #1131

See merge request !866

reduce retries of tests to prevent running into 1h timeout. Fix "new document" button text in Nextcloud taiko test

TRIGGER_JOBS=enable-monitoring,enable-nextcloud,enable-velero,enable-wekan,enable-wordpress,enable-zulip

Resolve "Document alertmanager emails and what they mean"

Closes #1169

See merge request !864

Fixes: #1169

Resolve "k3s.yml can be broken by running the playbook several times"

Closes #1014

See merge request !861

Fixes: #1014

Mitogen seems dead (last release Dec 2020), and ansible-core 2.9.x is EOL
in May 2022 (https://docs.ansible.com/ansible/devel/reference_appendices/release_and_maintenance.html#ansible-core-changelogs).

Resolve "Installation try out"

See merge request !860

edit install_stackspin.rst to make it harder to skip steps. Also add (re)activating your virtualenv to those instructions

move all provisioninig machine prerequisites into one place, make distinction between provisioning and VPS clearer

Resolve "Add stackspin theme for documentation"

Closes #1157

See merge request !857

Resolve "Add mem limits/requests to zulip rabbitmq and redis pods"

Closes #1156

See merge request !853

V0.8beta1

See merge request !848

Resolve "Upgrade zulip postgres to v14"

Closes #1143

See merge request !854

Fixes: #1143

Resolve "Fix nextcloud-onlyoffice InfoInhibitor alerts"

Closes #1155

See merge request !855

Update Helm release nextcloud-onlyoffice to v0.7.4

See merge request !851