fix: add prefix for invalidate endpoint (#2571)

Author: EslamHiko

lib/utils/routes.js

@@ -22,7 +22,7 @@ function routes(server) {
     createReadStream(join(clientBasePath, 'default/index.bundle.js')).pipe(res);
   });
 
-  app.get('/invalidate', (_req, res) => {
+  app.get('/webpack-dev-server/invalidate', (_req, res) => {
     server.invalidate();
     res.end();
   });

test/server/utils/routes.test.js

@@ -48,8 +48,12 @@ describe('routes util', () => {
     });
   });
 
-  it('GET request to invalidate endpoint', (done) => {
-    req.get('/invalidate').expect(200, done);
+  it('should handles GET request to invalidate endpoint', (done) => {
+    req.get('/webpack-dev-server/invalidate').then(({ res }) => {
+      expect(res.headers['content-type']).not.toEqual('text/html');
+      expect(res.statusCode).toEqual(200);
+      done();
+    });
   });
 
   it('should handles GET request to live html', (done) => {