feat: add sample test route

Author: lauslim12

examples/echo-bot-ts/README.md

@@ -81,6 +81,8 @@ heroku config:set CHANNEL_SECRET=YOUR_CHANNEL_SECRET
 - Push the application to the server.
 
 ```bash
+git add .
+git commit -m "Initial commit for Heroku testing"
 git push heroku master
 ```
 

examples/echo-bot-ts/index.ts

@@ -47,6 +47,18 @@ const textEventHandler = async (event: WebhookEvent): Promise<MessageAPIResponse
 app.use(middleware(middlewareConfig));
 
 // Route handler to receive webhook events.
+// This route is used to receive connection tests.
+app.get(
+  '/',
+  async (_: Request, res: Response): Promise<Response> => {
+    return res.status(200).json({
+      status: 'success',
+      message: 'Connected successfully!',
+    });
+  }
+);
+
+// This route is used for the Webhook.
 app.post(
   '/webhook',
   async (req: Request, res: Response): Promise<Response> => {