docs: add server 11 release notes

modules/ROOT/pages/server_release_notes.adoc

@@ -17,6 +17,53 @@ next@docs::server_release_notes.adoc, next@docs_main::server_release_notes.adoc
 toc::[]
 
 
+== Changes in 11.0.0
+
+Dear ownCloud administrator, find below the changes and known issues in ownCloud Server 11.0.0 that need your attention. You can also read the {oc-changelog-url}[full ownCloud Server changelog] for further details on what has changed.
+
+[IMPORTANT]
+====
+* This is a major release change. +
+Only a Dockerised deployment is provided, containing all the required prerequisites with a few exceptions.
+
+* ownCloud code is based on PHP 8. +
+All apps shipped with the image, as well as the code, are updated to comply with PHP 8.
+
+* To use this version, you will need to migrate your configuration, and possibly your data too.
+====
+
+[discrete]
+=== Fixes and Changes
+
+* Security:
+
+* Bugfix:
+
+=== Breaking Changes
+
+[discrete]
+==== Docker Only
+
+From this version onwards, ownCloud will only be available as a Docker deployment.
+
+[discrete]
+==== Environment Variable Changes
+
+* The `OWNCLOUD_SKELETON_DIRECTORY` envvar has been removed. The former skeleton folder is now exported as folder `skeleton` as part of the Docker volume.
+
+* By the nature of a Dockerised deployment, configuration keys related when logging to syslog are not relevant. Therefore, no environment variables exist. The configuration key `log_type` is therefore set internally to the default, which is `owncloud`.
+
+* Most configuration settings are now accessible via environment variables. The Kerberos App is of the few exceptions.
+
+[discrete]
+==== Apps
+
+The majority of ownCloud apps are now included in the image. There is no need to download them from the marketplace, and they have been updated to work with PHP 8. However, some apps have been deprecated and are no longer available. The affected apps are:
+
+* Impersonate
+* Microsoft Team Bridge
+* Sharepoint
+
 == Changes in 10.16.3
 
 Dear ownCloud administrator, find below the changes and known issues in ownCloud Classic 10.16.3 that need your attention. You can also read the {oc-changelog-url}[full ownCloud Classic changelog] for further details on what has changed.