Add Webapp

webapp/app/call/page.tsx

@@ -0,0 +1,19 @@
+import React from 'react'
+
+export default function CallScreen() {
+  return (
+    <div className='w-full flex flex-col h-screen'>
+        <div className='flex justify-evenly'>
+            <button>Call</button>
+            <button>White board</button>
+            <button>Settings</button>
+        </div>
+        <div className='grow bg-blue-200 flex'>
+            <div className='grow'>
+            <video />
+            </div>
+            <div>Chat</div>
+        </div>
+    </div>
+  )
+}