restructure for backend/frontend separation

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

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+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+
+
+const routes: Routes = [];
+
+@NgModule({
+  imports: [RouterModule.forRoot(routes)],
+  exports: [RouterModule]
+})
+export class AppRoutingModule { }

frontend/ng-karaoqueue/src/app/app.component.html

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+<div>
+  <mat-toolbar color="primary">
+    <span>KaraoQueue</span>
+  </mat-toolbar>
+</div>
+<router-outlet></router-outlet>

frontend/ng-karaoqueue/src/app/app.component.spec.ts

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+import { TestBed, async } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        RouterTestingModule
+      ],
+      declarations: [
+        AppComponent
+      ],
+    }).compileComponents();
+  }));
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.debugElement.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it(`should have as title 'ng-karaoqueue'`, () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.debugElement.componentInstance;
+    expect(app.title).toEqual('ng-karaoqueue');
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.debugElement.nativeElement;
+    expect(compiled.querySelector('.content span').textContent).toContain('ng-karaoqueue app is running!');
+  });
+});

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

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+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+  styleUrls: ['./app.component.css']
+})
+export class AppComponent {
+  title = 'KaraoQueue';
+}

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

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+import { BrowserModule } from '@angular/platform-browser';
+import { NgModule } from '@angular/core';
+
+import { AppRoutingModule } from './app-routing.module';
+import { AppComponent } from './app.component';
+import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
+import { MatSliderModule } from '@angular/material/slider';
+import { MatToolbarModule } from '@angular/material/toolbar'
+
+@NgModule({
+  declarations: [
+    AppComponent
+  ],
+  imports: [
+    BrowserModule,
+    AppRoutingModule,
+    BrowserAnimationsModule,
+    MatSliderModule,
+    MatToolbarModule
+  ],
+  providers: [],
+  bootstrap: [AppComponent]
+})
+export class AppModule { }