Adding ServerTransferStateModule for AU with custom http interceptor for cache transfer.

frontend/src/app/app.server.module.ts

@@ -1,13 +1,19 @@
+import { HTTP_INTERCEPTORS } from '@angular/common/http';
 import { NgModule } from '@angular/core';
-import { ServerModule } from '@angular/platform-server';
+import { ServerModule, ServerTransferStateModule } from '@angular/platform-server';
 
 import { AppModule } from './app.module';
 import { AppComponent } from './components/app/app.component';
+import { HttpCacheInterceptor } from './services/http-cache.interceptor';
 
 @NgModule({
   imports: [
     AppModule,
     ServerModule,
+    ServerTransferStateModule,
+  ],
+  providers: [
+    { provide: HTTP_INTERCEPTORS, useClass: HttpCacheInterceptor, multi: true }
   ],
   bootstrap: [AppComponent],
 })