feat: ping endpoint

src/main.ts

@@ -70,6 +70,10 @@ app.get("/api/config", (c) => {
 	});
 });
 
+app.get("/api/ping", (c) => {
+	return c.json({ pong: true });
+});
+
 app.post("/api/user", async (c) => {
 	const { token } = await c.req.json();
 	if (!token) {