Add new info in README

README.md

@@ -1,6 +1,14 @@
 # Matrix Gateway
 WIP project
 
+Project that expose a simple API to make use of Matrix API. It acts as a Matrix client (like Element for example)
+
+**Known limitations**:
+
+- Supports only a limited subset of Matrix API
+- Does not support E2E encryption
+
+Project written in Rust.
 
 ## Setup dev environment
 ```