Add utility to generate a random game code.

src/utils/gamecode.ts

@@ -0,0 +1,10 @@
+export const generate_game_code = (): string => {
+	let game_code = ``;
+
+	// Generate the game code using the length given
+	do {
+		game_code += Math.floor(Math.random() * 9);
+	} while (game_code.length < 6);
+
+	return game_code
+}