Remove /backend prefix from routes

Also adapts to renamed routes

src/app/user.service.ts

@@ -221,7 +221,7 @@ export class UserService {
   }
 
   private fetch(): void {
-    this.http.get<State>('/backend/api/state').subscribe(
+    this.http.get<State>('/webpage/state').subscribe(
       (state: State) => this.updateState(state),
       this.handleError(false, 'Error fetching state. Try again later'),
     );
@@ -270,7 +270,7 @@ export class UserService {
   }
 
   private fetchIdPInfo(): void {
-      this.http.get<IdPInfo>('/backend/auth/v1/info').subscribe(
+      this.http.get<IdPInfo>('/auth/info').subscribe(
         idpInfo => {
           this.idpInfo.next(idpInfo);
           this.idpInfo.complete();
@@ -328,7 +328,7 @@ export class UserService {
   }
 
   public logout(): void {
-    this.http.post<State>('/backend/auth/v1/logout', undefined).subscribe(
+    this.http.post<State>('/auth/logout', undefined).subscribe(
       (state: State) => this.updateState(state),
       (err: HttpErrorResponse) => {
         this.updateState(undefined);