chore: update readme

packages/web/README.md

@@ -1 +1,14 @@
-# Figma Chat Web-Client
+# Figma Chat Web-Client
+
+This package includes the Figma Chat web client. You can find the main instance here https://figma-chat.vercel.app/.
+
+## But Why?
+
+Quite simple. People who don't have rights to edit your Figma file can't run plugins.
+
+## How to use?
+
+Open the plugin inside your file and go to settings. Send https://figma-chat.vercel.app/ to the person you want to chat with and copy the "Auth-String" for them. This serves as a password, so don't give it to anyone else.
+**Only people can enter a room if at least one person in the figma file is online.**
+
+<img width="329" alt="Screenshot 2021-11-07 at 21 01 22" src="https://user-images.githubusercontent.com/15351728/140659996-76079821-2f8e-48ff-91b1-05b054446961.png">