Add event listeners for cleanup

src/main.ts

@@ -1,4 +1,5 @@
 import * as sio from "socket.io";
+import { writeFileSync } from "fs";
 import { Vote } from "./events/Vote";
 import { JoinGame } from "./events/JoinGame";
 import { HostGame } from "./events/HostGame";
@@ -30,6 +31,11 @@ function clean_up() {
 	};
 	console.log(`Finished saving games to disk.`);
 }
+
+// Listen to the signals for the cleanup requirement
+process.on(`uncaughtException`, clean_up);
+process.on('SIGINT', clean_up);
+
 const io = sio.listen(3000);
 
 io.on(`connection`, (socket: sio.Socket) => {