Update docs/configuring-playbook-ssl-certificates.md: tidy up

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

docs/configuring-playbook-ssl-certificates.md

@@ -11,57 +11,56 @@ SPDX-License-Identifier: AGPL-3.0-or-later
 
 # Adjusting SSL certificate retrieval (optional, advanced)
 
-By default, this playbook retrieves and auto-renews free SSL certificates from [Let's Encrypt](https://letsencrypt.org/) for the domains it needs (e.g. `matrix.example.com` and others)
+By default, the playbook retrieves and automatically renews free SSL certificates from [Let's Encrypt](https://letsencrypt.org/) via [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) for the domains of the services it installs (e.g. `matrix.example.com` and others). Refer this guide if you want to modify settings about how it manages SSL certificates or have the Traefik server use yours.
 
-This guide is about using the integrated Traefik server and doesn't apply if you're using [your own webserver](configuring-playbook-own-webserver.md).
+**Note**: the guide is intended to be referred for configuring the integrated Traefik server with regard to SSL certificates retrieval. If you're using [your own webserver](configuring-playbook-own-webserver.md), consult its documentation about how to configure it.
 
-## Using staging Let's Encrypt certificates instead of real ones
+## Use staging Let's Encrypt certificates
 
-For testing purposes, you may wish to use staging certificates provide by Let's Encrypt.
+For testing purposes, you may wish to use staging certificates provided by Let's Encrypt to avoid hitting [its rate limits](https://letsencrypt.org/docs/rate-limits/).
 
-Add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
+To use ones, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
 
 ```yaml
 traefik_config_certificatesResolvers_acme_use_staging: true
 ```
 
-## Disabling SSL termination
+## Disable SSL termination
 
 For testing or other purposes, you may wish to install services without SSL termination and have services exposed to `http://` instead of `https://`.
 
-Add the following configuration to your `vars.yml` file:
+To do so, add the following configuration to your `vars.yml` file:
 
 ```yaml
 traefik_config_entrypoint_web_secure_enabled: false
 ```
 
-## Using self-signed SSL certificates
+## Use self-signed SSL certificates
 
-If you'd like to use your own SSL certificates, instead of the default (SSL certificates obtained automatically via [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) from [Let's Encrypt](https://letsencrypt.org/)):
+To use self-signed certificates, generate them and follow the documentation below about using your own certificates.
 
-- generate your self-signed certificate files
-- follow the [Using your own SSL certificates](#using-your-own-ssl-certificates) documentation below
+## Use your own SSL certificates
 
-## Using your own SSL certificates
+To use your own certificates, prepare them and follow the steps below:
 
-To use your own SSL certificates with Traefik, you need to:
+- Disable [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) / [Let's Encrypt](https://letsencrypt.org/) support
+- Put a custom Traefik configuration file on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
+- Register your custom configuration file with Traefik, by adding an extra provider of type [file](https://doc.traefik.io/traefik/providers/file/)
+- Put the SSL files on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
 
-- disable [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) / [Let's Encrypt](https://letsencrypt.org/) support
-- put a custom Traefik configuration file on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
-- register your custom configuration file with Traefik, by adding an extra provider of type [file](https://doc.traefik.io/traefik/providers/file/)
-- put the SSL files on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
+For those steps, you can add the following configuration to your `vars.yml` file (adapt to your needs). If you will put the custom configuration files manually, make sure to remove the `aux_file_definitions` variable.
 
 ```yaml
 # Disable ACME / Let's Encrypt support.
 traefik_config_certificatesResolvers_acme_enabled: false
 
-# Disabling ACME support (above) automatically disables the creation of the SSL directory.
-# Force-enable it here, because we'll add our certificate files there.
+# Disabling ACME support (above) automatically disables the SSL directory to be created.
+# Force-enable it to be created with this configuration, because we'll add our certificate files there.
 traefik_ssl_dir_enabled: true
 
-# Tell Traefik to load our custom ssl key pair by extending provider configuration.
+# Tell Traefik to load our custom SSL key pair by extending provider configuration.
 # The key pair files are created below, in `aux_file_definitions`.
-# The `/ssl/…` path is an in-container path, not a path on the host (like `/matrix/traefik/ssl`). Do not change it!
+# Note that the `/ssl/…` path is an **in-container path**, not a path on the host (like `/matrix/traefik/ssl`). Do not change it!
 traefik_provider_configuration_extension_yaml:
   tls:
     certificates:
@@ -74,14 +73,14 @@ traefik_provider_configuration_extension_yaml:
           keyFile: /ssl/privkey.pem
 
 # Use the aux role to create our custom files on the server.
-# If you'd like to do this manually, you remove this `aux_file_definitions` variable.
+# If you'd like to do this manually, remove this `aux_file_definitions` variable.
 aux_file_definitions:
   # Create the privkey.pem file on the server by
   # uploading a file from the computer where Ansible is running.
   - dest: "{{ traefik_ssl_dir_path }}/privkey.pem"
     src: /path/on/your/Ansible/computer/to/privkey.pem
     # Alternatively, comment out `src` above and uncomment the lines below to provide the certificate content inline.
-    # Note the indentation level.
+    # Mind the indentation level (indented with two white space characters).
     # content: |
     #   FILE CONTENT
     #   HERE
@@ -91,20 +90,22 @@ aux_file_definitions:
   - dest: "{{ traefik_ssl_dir_path }}/cert.pem"
     src: /path/on/your/Ansible/computer/to/cert.pem
     # Alternatively, comment out `src` above and uncomment the lines below to provide the certificate content inline.
-    # Note the indentation level.
+    # Mind the indentation level (indented with two white space characters).
     # content: |
     #   FILE CONTENT
     #   HERE
 ```
 
-## Using a DNS-01 ACME challenge type, instead of HTTP-01
+## Use a DNS-01 ACME challenge type, instead of HTTP-01
 
-You can configure Traefik to use the [DNS-01 challenge type](https://letsencrypt.org/docs/challenge-types/#dns-01-challenge) for Let's Encrypt. This is less commonly used than the default [HTTP-01 challenge type](https://letsencrypt.org/docs/challenge-types/#http-01-challenge), but it can be helpful to:
+You can configure Traefik to use the [DNS-01 challenge type](https://letsencrypt.org/docs/challenge-types/#dns-01-challenge) for Let's Encrypt. This is less commonly used than the default [HTTP-01 challenge type](https://letsencrypt.org/docs/challenge-types/#http-01-challenge), but can be helpful to:
 
 - hide your public IP from Let's Encrypt logs
 - allow you to obtain SSL certificates for servers which are not accessible (via HTTP) from the public internet (and for which the HTTP-01 challenge would fail)
 
-This is an example for how to edit the `vars.yml` file if you're using Cloudflare:
+### Example: Cloudflare
+
+Here is an example for configurations on the `vars.yml` file for Cloudflare. Please adjust it as necessary before applying it.
 
 ```yaml
 traefik_config_certificatesResolvers_acme_dnsChallenge_enabled: true