Write release notes

Author: bellebaum

README.md

@@ -15,6 +15,8 @@ the [Industrial Data Space](https://industrial-data-space.github.io/trusted-conn
 under the hood to support research projects.
 It is **NOT** a production grade solution and should not be used as such.
 
+Before updating, please take a look at `release_notes.md` to see if an update requires manual intervention.
+
 ## Table of Contents
 
 - [Supported Standards](#spec)

release_notes.md

@@ -0,0 +1,15 @@
+# Release Notes
+
+Please read these notes carefully before updating.
+**Bold** notes require manual intervention.
+
+## V 1.1.1
+
+- **The default user backend for new users can (and must) now be specified using the new `user_backend_default` key in `omejdn.yml`**
+- Mainly Bugfixes
+
+## V 1.1.0
+
+- **Client certificate files are now chosen automatically. You may import your current certs by specifying a file as `import_certfile` for each client. `certfile` is now depricated**
+- **The user selfservice API must now be explicitly enabled in `omejdn.yml`**
+- RFC 8707 resource indication capabilities