Evrything is working.

Existing parts of frontend can access backend.

frontend/ng-karaoqueue/src/app/app.module.ts

@@ -1,6 +1,5 @@
 import { BrowserModule, DomSanitizer } from '@angular/platform-browser';
 import { NgModule } from '@angular/core';
-import { RuntimeConfigLoaderModule } from 'runtime-config-loader';
 
 import { AppRoutingModule } from './app-routing.module';
 import { AppComponent } from './app.component';
@@ -94,7 +93,6 @@ import { debounceTime, distinctUntilChanged } from "rxjs/operators";
     MatTooltipModule,
     MatTreeModule,
     HttpClientModule,
-    RuntimeConfigLoaderModule
   ],
   providers: [],
   bootstrap: [AppComponent]