Replace custom test-server with Grunt connect

package.json

@@ -94,7 +94,7 @@
     "test:mocha": "grunt build && grunt test",
     "test:browser": "playwright test --config tests/browser/playwright.config.js tests/browser/spec.js",
     "test:integration": "grunt integration-tests",
-    "test:serve": "node ./tests/server.js",
+    "test:serve": "grunt connect:server:keepalive",
     "extensive-tests-and-publish-to-aws": "npx mocha tasks/tests/ && grunt --stack extensive-tests-and-publish-to-aws",
     "--- combined tasks ---": "",
     "check-before-pull-request": "concurrently --kill-others-on-fail npm:lint npm:test"

tests/browser/playwright.config.js

@@ -19,7 +19,7 @@ const config = {
   reporter: 'list',
   webServer: {
     command: 'npm run test:serve',
-    port: 3000,
+    port: 9999,
     reuseExistingServer: false
   }
 };

tests/server.js

@@ -1,36 +0,0 @@
-const fs = require('fs');
-const http = require('http');
-const path = require('path');
-
-const mimeTypes = {
-  css: 'text/css',
-  html: 'text/html',
-  js: 'text/javascript',
-  json: 'application/json'
-};
-
-// Serve static files for spec tests
-http
-  .createServer(function(req, res) {
-    const url = new URL(req.url, `http://${req.headers.host}`);
-    let filePath = `${path.resolve(__dirname, '..')}${url.pathname}`;
-
-    if (fs.existsSync(filePath) && fs.statSync(filePath).isDirectory()) {
-      filePath += filePath.endsWith('/') ? '' : '/';
-      filePath += 'index.html';
-    }
-
-    fs.readFile(filePath, function(err, data) {
-      if (err) {
-        res.writeHead(404);
-        res.end(JSON.stringify(err));
-        return;
-      }
-
-      let mimeType = mimeTypes[filePath.split('.').pop()] || 'text/plain';
-
-      res.writeHead(200, { 'Content-Type': mimeType });
-      res.end(data);
-    });
-  })
-  .listen(3000);