added matrix-client-cinny

docs/configuring-playbook-client-cinny.md

@@ -0,0 +1,21 @@
+# Configuring Cinny (optional)
+
+This playbook can install the [cinny](https://github.com/ajbura/cinny) Matrix web client for you.
+cinny is a web client focusing primarily on simple, elegant and secure interface.
+cinny can be installed alongside or instead of Element.
+
+If you'd like cinny to be installed, add the following to your configuration file (`inventory/host_vars/matrix.<your-domain>/vars.yml`):
+
+```yaml
+matrix_client_cinny_enabled: true
+```
+
+You will also need to add a DNS record so that cinny can be accessed.
+By default cinny will use https://cinny.DOMAIN so you will need to create an CNAME record
+for `cinny`. See [Configuring DNS](configuring-dns.md).
+
+If you would like to use a different domain, add the following to your configuration file (changing it to use your preferred domain):
+
+```yaml
+ matrix_server_fqn_cinny: "app.{{ matrix_domain }}"
+```