feat(helmfile): Introduce additional variables for mailDomain and synapseDomain

docs/ci.md

@@ -20,7 +20,8 @@ When starting the pipeline through the GitLab UI, you will be queried for some v
 When starting the pipeline through the GitLab UI, you will be queried for some variables plus the following ones:
 
 - `DOMAIN` = The domain to deploy to.
-- `MAIL_DOMAIN` = The mail domain to use.
+- `MAIL_DOMAIN` = (optional) Specify domain (f.e. root FQDN) for Mail, defaults to `DOMAIN`.
+- `SYNAPSE_DOMAIN` = (optional) Specify domain (f.e. root FQDN) for Synapse, defaults to `DOMAIN`.
 - `NAMESPACE`: Defines into which namespace of your K8s cluster openDesk will be installed
 - `MASTER_PASSWORD_WEB_VAR`: Overwrites value of `MASTER_PASSWORD`
 

docs/getting-started.md

@@ -92,18 +92,27 @@ or via environment variable
 export DOMAIN=domain.tld
 ```
 
-If the mail domain differs from the domain, the mail
-domain has to be set either via `dev` environment
+Additionally, you can announce/specify an alternative Domain for mail and chat.
+
+As example, your domain is `acme.tld` and you want to send mails with this domain, then you can deploy openDesk to
+`*.opendesk.acme.tld` and send mail as `default.user@acme.tld`.
+Webmail will be accessed via `mail.opendesk.acme.tld` in this scenario.
+The required routing have to be implemented by yourself. 
+Users
+
+The alternative domains have to be set either via `dev` environment
 
 ```yaml
 global:
-  mail_domain: "open.desk"
+  mailDomain: "open.desk"
+  synapseDomain: "open.desk"
 ```
 
 or via environment variable
 
 ```shell
 export MAIL_DOMAIN=open.desk
+export SYNAPSE_DOMAIN=open.desk
 ```
 
 ### Apps