Update docs for DNS settings etc. (#3936)

* Update docs for DNS settings of the services which need its CNAME record by default

- Buscarron
- Go-NEB; fix a line on the instruction as well
- wsproxy
- Cinny
- Element Web
- Hydrogen
- SchildiChat Web
- Dimension
- Etherpad
- Jitsi
- ntfy
- Grafana
- rageshake
- Sygnal

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings of the services which do not need its CNAME record by default

- matrix-alertmanager-receiver
- Honoroit
- maubot
- Heisenbridge
- Cactus Comments
- Matrix Authentication Service
- matrix-registration
- Sliding Sync proxy
- Synapse Admin
- synapse-usage-exporter

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: ma1sd

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: Email2Matrix

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for DNS settings: Postmoogle

Remove the table from configuring-dns.md altogether

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs for Cinny and Dimension: adopt the common note

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Update docs/configuring-dns.md: add "Note" to the line on using Cloudflare DNS

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

---------

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-client-element-web.md

@@ -9,6 +9,12 @@ If you'd like to stop the playbook installing the client, see the section [below
 - [app.element.io](https://app.element.io/), hosted by [Element](https://element.io/)
 - [app.etke.cc](https://app.etke.cc/), hosted by [etke.cc](https://etke.cc/)
 
+## Adjusting DNS records
+
+By default, this playbook installs Element Web on the `element.` subdomain (`element.example.com`) and requires you to create a CNAME record for `element`, which targets `matrix.example.com`.
+
+When setting, replace `example.com` with your own.
+
 ## Adjusting the playbook configuration
 
 ### Themes
@@ -40,9 +46,7 @@ If you define your own themes with it and set `matrix_client_element_themes_enab
 
 If you make your own theme, we encourage you to submit it to the **aaronraimist/element-themes** project, so that the whole community could easily enjoy it.
 
-### Adjusting the Element Web URL
-
-By default, this playbook installs Element Web on the `element.` subdomain (`element.example.com`) and requires you to [adjust your DNS records](#adjusting-dns-records).
+### Adjusting the Element Web URL (optional)
 
 By tweaking the `matrix_client_element_hostname` and `matrix_client_element_path_prefix` variables, you can easily make the service available at a **different hostname and/or path** than the default one.
 
@@ -57,6 +61,10 @@ matrix_client_element_hostname: "{{ matrix_server_fqn_matrix }}"
 matrix_client_element_path_prefix: /element
 ```
 
+After changing the domain, **you may need to adjust your DNS** records to point the Element domain to the Matrix server.
+
+If you've decided to reuse the `matrix.` domain, you won't need to do any extra DNS configuration.
+
 ### Extending the configuration
 
 There are some additional things you may wish to configure about the component.
@@ -84,14 +92,6 @@ matrix_client_element_configuration_extension_json: |
  }
 ```
 
-## Adjusting DNS records
-
-Once you've decided on the domain and path, **you may need to adjust your DNS** records to point the Element Web domain to the Matrix server.
-
-By default, you will need to create a CNAME record for `element`. See [Configuring DNS](configuring-dns.md) for details about DNS changes.
-
-If you've decided to reuse the `matrix.` domain, you won't need to do any extra DNS configuration.
-
 ## Disabling Element Web
 
 If you'd like for the playbook to not install Element Web (or to uninstall it if it was previously installed), add the following configuration to your `vars.yml` file: