Fix silly issues

- Removed user network (errornous merging).
- Removed duplicate providers

Author: LimZiJia

compose.yml

@@ -61,5 +61,3 @@ volumes:
 networks:
   question-db-network:
     driver: bridge
-  user-network:
-    driver: bridge

frontend/src/app/app.config.ts

@@ -18,7 +18,6 @@ export const appConfig: ApplicationConfig = {
         ),
         { provide: HTTP_INTERCEPTORS, useClass: JwtInterceptor, multi: true },
         { provide: HTTP_INTERCEPTORS, useClass: ErrorInterceptor, multi: true },
-        provideHttpClient(),
         AuthGuardService
     ],
 };