start of error interceptor

src/app/http-interceptors/index.ts

@@ -3,10 +3,12 @@ import { HTTP_INTERCEPTORS } from '@angular/common/http';
 
 import { CSRFInterceptor } from './csrf.interceptor';
 import { CachingInterceptor } from './caching.interceptor';
+import { ErrorInterceptor } from './error.interceptor';
 
 /** Http interceptor providers in outside-in order */
 export const httpInterceptorProviders = [
     { provide: HTTP_INTERCEPTORS, useClass: CachingInterceptor, multi: true },
+    { provide: HTTP_INTERCEPTORS, useClass: ErrorInterceptor, multi: true },
     // CSRFInterceptor needs to be last 
     { provide: HTTP_INTERCEPTORS, useClass: CSRFInterceptor, multi: true },
 ];