fix(service-worker): enhance unregister logic and update index.html

- Updated the index.html to load the env-config.js script as a module for better compatibility.
- Improved the unregister logic in both the unregister-sw.js and login-page.tsx to specifically target the ngsw-worker, ensuring it is unregistered correctly and the page reloads afterward. This prevents multiple unregister attempts and enhances user experience.

worklenz-frontend/public/unregister-sw.js

@@ -2,13 +2,18 @@ if ('serviceWorker' in navigator) {
   // Check if we've already attempted to unregister in this session
   if (!sessionStorage.getItem('swUnregisterAttempted')) {
     navigator.serviceWorker.getRegistrations().then(function(registrations) {
-      if (registrations.length > 0) {
+      const ngswWorker = registrations.find(reg => reg.active?.scriptURL.includes('ngsw-worker'));
+      
+      if (ngswWorker) {
         // Mark that we've attempted to unregister
         sessionStorage.setItem('swUnregisterAttempted', 'true');
-        // If there are registered service workers, do a hard reload first
-        window.location.reload(true);
+        // Unregister the ngsw-worker
+        ngswWorker.unregister().then(() => {
+          // Reload the page after unregistering
+          window.location.reload(true);
+        });
       } else {
-        // If no service workers are registered, unregister any that might be pending
+        // If no ngsw-worker is found, unregister any other service workers
         for(let registration of registrations) {
           registration.unregister();
         }