use reverse_proxy role, traefik for jitsi

docs/element.md

@@ -1,18 +1,22 @@
 # Required variables
-These variables are required. Example values included. Some general variables might also be required for this role.
+These variables are required. Example values included.
 
 ```
 ports:
   element_http: 8080
 
+element_domains: # not required if reverse_proxy_type is set to none
+  - chat.domain.tld
+  - element.domain.tld
+
 matrix_domain: domain.tld
 matrix_server_domain: matrix.domain.tld
 ```
 
+# Optional variables
 These variables are optional and have the following default values:
 ```
 matrix_external_url: https://{{ matrix_server_domain }}
-reverse_proxy_type: caddy
 
 jitsi_domain: jitsi.riot.im
 ```

docs/general.md

@@ -1,6 +1,13 @@
 # Required variables
-These variables are required by some roles. Example values included.
+These variables are required by multiple roles. Example values included.
 
 ```
 timezone: 'Europe/Helsinki'
 ```
+
+# Optional variables
+These variables are used by multiple roles and have the following default values:
+
+```
+reverse_proxy_type: caddy # Allowed values: caddy, traefik, none
+```

docs/jitsi.md

@@ -5,5 +5,5 @@ These variables are required. Example values included. Some general variables mi
 ports:
   jitsi_http: 8080
 
-jitsi_external_url: 'https://jitsi.domain.tld'
+jitsi_domain: 'jitsi.domain.tld'
 ```