Update readme with meeting information (#14)

README.md

@@ -2,6 +2,20 @@
 
 This is the repository of the [identity and authentication working group](https://wiki.internetcomputer.org/wiki/Identity_%26_Authentication). This repository is used to collaborate, document decisions, discuss changes, raise issues and provide feedback.
 
+## Meetings
+
+Meetings happen every two weeks.
+
+The agenda will consist of discussing new and active issues and pull-requests, as well as going through the list of announced presentations in [this Google doc](https://docs.google.com/document/d/1wSVgXE23LYB4YACm9w2DY92PF5e587I0F5n1fTCWXOE/edit#heading=h.1gqbu1vngt6i).
+
+Please consult the [working group calendar](https://calendar.google.com/calendar/u/0/[email protected]&ctz=Europe/Zurich) for the next meeting date.
+
+## Contributing
+
+Everyone is welcome to join the public meetings of the working group.
+* If you want to discuss a specific topic, please create and issue or pull-request. We will go over all the newly created issues and PRs in the next meeting.
+* If you own a cool project related to Identity and built on the IC you are welcome to do a presentation in one of the meetings. If you wish to do so, please add your presentation (title, short summary and estimated time required) to [this Google doc](https://docs.google.com/document/d/1wSVgXE23LYB4YACm9w2DY92PF5e587I0F5n1fTCWXOE/edit#heading=h.1gqbu1vngt6i).  
+
 ## Working Group Members
 
 The working group sessions are public and everybody is welcome. If you are interested in discussions about identity and authentication on the IC, please join us.