Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1171

All of `setup_install.yml` only runs if `matrix_bot_matrix_reminder_bot_enabled`,
so it's not necessary to add that condition once again.

We'd rather not suppress pull errors or run self-build tasks if pulling fails.

* root path for the base domain

* Fix path when running in a container

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

Fixes an issue related to https://github.com/anoadragon453/matrix-reminder-bot/issues/86

Upgrade certbot (v1.16.0 -> v1.17.0) nginx (1.21.0 -> 1.21.1)

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1158

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1154

According to
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy,
having both a header and the `<meta>`-tag provided by Element itself is
not a problem. The 2 CSP policies get combined.

https://github.com/matrix-org/synapse/releases/tag/v1.37.1