Added slide toggle

src/app/app.module.ts

@@ -21,6 +21,7 @@ import { FormsModule } from '@angular/forms';
 import { GameComponent } from './game/game.component';
 import { GuesserComponent } from './guesser/guesser.component';
 import {MatSlideToggleModule} from '@angular/material/slide-toggle';
+import {MatIconModule} from '@angular/material/icon';
 
 @NgModule({
   declarations: [
@@ -46,7 +47,8 @@ import {MatSlideToggleModule} from '@angular/material/slide-toggle';
     MatCardModule,
     MatProgressSpinnerModule,
     FormsModule,
-    MatSlideToggleModule
+    MatSlideToggleModule,
+    MatIconModule
   ],
   providers: [],
   bootstrap: [AppComponent]

src/app/overview/overview.component.html

 <div style="text-align: center; margin-left: 15em; margin-right: 15em; margin-top: 5em;">
   <mat-card class="transparent">
     <h2>Wähle dein Team</h2>
-    <mat-slide-toggle>Slide me!</mat-slide-toggle>
+    <mat-icon color = "disabled" aria-hidden="false" aria-label="home icon blue">home</mat-icon>
+    Team grau <mat-slide-toggle color = "warn"> Team rot</mat-slide-toggle>
+    <mat-icon color = "warn" aria-hidden="false" aria-label="home icon red">home</mat-icon>
   </mat-card>
   <br>
   <br>