feat: Implement healthcheck api endpoint

packages/backend/src/controllers/healthcheck/index.js

@@ -0,0 +1,3 @@
+export default async (request, response) => {
+  response.status(200).end();
+};

packages/backend/src/controllers/healthcheck/index.test.js

@@ -0,0 +1,9 @@
+import { describe, it } from 'vitest';
+import request from 'supertest';
+import app from '../../app.js';
+
+describe('GET /healthcheck', () => {
+  it('should return 200 response with version data', async () => {
+    await request(app).get('/healthcheck').expect(200);
+  });
+});

packages/backend/src/routes/healthcheck.js

@@ -0,0 +1,8 @@
+import { Router } from 'express';
+import indexAction from '../controllers/healthcheck/index.js';
+
+const router = Router();
+
+router.get('/', indexAction);
+
+export default router;

packages/backend/src/routes/index.js

@@ -2,11 +2,13 @@ import { Router } from 'express';
 import graphQLInstance from '../helpers/graphql-instance.js';
 import webhooksRouter from './webhooks.js';
 import paddleRouter from './paddle.ee.js';
+import healthcheckRouter from './healthcheck.js';
 
 const router = Router();
 
 router.use('/graphql', graphQLInstance);
 router.use('/webhooks', webhooksRouter);
 router.use('/paddle', paddleRouter);
+router.use('/healthcheck', healthcheckRouter);
 
 export default router;