Added room list fetching from database and sending of it on user connection

back/src/db/index.ts

@@ -17,4 +17,8 @@ export const connect = () =>
     entities: [Room],
   });
 
+export const getRoomList = (connection: Connection) => {
+  return connection.manager.find(Room);
+};
+
 export { Room };

back/src/index.ts

@@ -1,12 +1,15 @@
 import "reflect-metadata";
 import { Server } from "ws";
+import { connect, getRoomList } from "./db";
 
 (async () => {
+  const connection = await connect();
+
   const wss = new Server({
     port: Number.parseInt(process.env.PORT || "") || 8081,
   });
 
   wss.on("connection", async (ws) => {
-    ws.send("hello");
+    ws.send(JSON.stringify(await getRoomList(connection)));
   });
 })();