cleanup (subfolder removed, npm packages removed, etc.); added y-websocket-server code

README.md

@@ -1,7 +1,28 @@
 # P2P Poll App
 
-## Setup
-mkdir yjs-poll
-cd yjs-poll
+## Install npm packages
+```
 npm init -y
-npm install y-websocket ws
+npm install
+```
+
+Note: the frontend obtains the packages `yjs` and `y-websocket` dynamically.
+
+## Run backend
+```
+node backend.js
+```
+
+### Note on Yjs suggestion
+Note that the following server setup is suggested in the Yjs docs (https://docs.yjs.dev/ecosystem/connection-provider/y-websocket):
+```
+npm install y-websocket-server
+HOST=localhost PORT=1000 npx y-websocket
+```
+
+However, across a range of npm versions, this does not work.
+Nevertheless, the essential code from the `y-websocket-server` package is used here as provided in `utils.js`.
+
+## Run frontend
+Open "frontend.html" in browser.
+