README.md update

README.md

 # Clock websocket React/TS UI
 
+Web interface for websocket clock server writter in typescript/react.
+
+Display a clock with possibility of changing timezone and adding alarms
+producing notifications using the JS Notifications API.
+
+Example deployment [here](https://yannweb.net/wsclock/).
+
+## TODO
+
+Replace the timezone update text input by two HTML selects, allowing to choose
+a continent and a city from selected continent. To implement this feature, the
+websocket server should implement a command returning a list of all available
+timezones.
+
+Add some tests, using jest ?
+
 ## Deployment
 
 ### Configure & build