feat: initial prototype works

I can log in and create a book! Woo!

apps/frontend/src/app/app.config.ts

@@ -1,10 +1,30 @@
 import {
   ApplicationConfig,
   provideBrowserGlobalErrorListeners,
+  APP_INITIALIZER,
 } from '@angular/core';
 import { provideRouter } from '@angular/router';
+import { provideHttpClient, withInterceptors, HTTP_INTERCEPTORS } from '@angular/common/http';
 import { appRoutes } from './app.routes';
+import { AuthService } from './services/auth.service';
+import { AuthInterceptor } from './interceptors/auth.interceptor';
+import { initializeAuth } from './initializers/auth.initializer';
 
 export const appConfig: ApplicationConfig = {
-  providers: [provideBrowserGlobalErrorListeners(), provideRouter(appRoutes)],
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideRouter(appRoutes),
+    provideHttpClient(),
+    {
+      provide: HTTP_INTERCEPTORS,
+      useClass: AuthInterceptor,
+      multi: true
+    },
+    {
+      provide: APP_INITIALIZER,
+      useFactory: initializeAuth,
+      deps: [AuthService],
+      multi: true
+    }
+  ],
 };