Upgrade hydrogen (v0.2.0 -> v0.2.3)

* root path for the base domain

* Fix path when running in a container

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

Docs - Change link to the correct Step

Added proxy config for synapse-admin

Added missing X-Forwarded-Proto header

Upgrade grafana (8.0.5 -> 8.0.6)

GoMatrixHosting v0.5.4

Added selfbuild functionality to mautrix-signal bridge

Update synapse to v1.38.0

Upgrade certbot, nginx & grafana

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

prometheus version 2.28.0 -> 2.28.1

GoMatrixHosting 0.5.2

Fix docs template syntax error in OIDC SSO example

Add worker metrics to prometheus exporter

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

Skip importing validate_config task when Synapse is disabled

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1145

Supersedes https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1145

GoMatrixHosting v0.5.1

Upgrade mjolnir (0.1.17 -> 0.1.18) and implement self building

Correct broken documentation link

Recently, documentation on Synapse has been changed from .rst to .md. Therefore, the current links for the purge history API were resulting in a 404 error.

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.