add functions, create and join room

src/Thread.js

@@ -0,0 +1,13 @@
+import React from 'react';
+import { Typography } from 'antd';
+import './Thread.css';
+
+const Thread = props => 
+  props.messages.map(m => {
+    console.log(m);
+    if (m.uid === '<system>') {
+      return <Typography.Text className="thread-item system-message" key={m.id} disabled>{m.text}</Typography.Text>
+    }
+  });
+
+  export default Thread;