searx: Remove

Got succeeded by searxng.

Add searxng role

Only basic configuration for now.
Successor for searx.

Closes: https://todo.xenrox.net/~xenrox/infrastructure/16

CI: Switch to ntfy access token authentication

alertmanager: Switch to ntfy access token authentication

For ntfy-alertmanager.

ntfy_client: Switch to access token authentication

CI: Add python-passlib package

Used for hashing passwords with bcrypt.

ntfy_server: Update config

2.0.0 release.

Fix ansible-lint failures with "mode"

Forbidden implicit octal value ...

srht: Update robots.txt

grafana: Update config

 9.3.6 release.

ssh: Update sshd config

alertmanager: Set external URL

This is used for better integration with ntfy-alertmanager.

alertmanager: Update ntfy-alertmanager config

alertmanager: Proxy ntfy-alertmanager with nginx

Exposing it is necessary for the "Silence" feature.

grafana: Add basic auth to Alertmanager datasource

alertmanager: Proxy with nginx

Needed for ntfy-alertmanager.

prometheus: Config file should not be world readable

There are multiple secrets contained inside.

alertmanager: Protect with basic auth

Alertmanager will get exposed with nginx, so silence integration with
ntfy-alertmanager can work.

Make ansible-lint happy

borg: Update sqlite backup

The mumble-server has a new database location now.