Merge pull request #591 from paperless-ngx/feature-version-checker

Feature: Update checker

src-ui/src/app/services/rest/remote-version.service.ts

@@ -0,0 +1,23 @@
+import { HttpClient } from '@angular/common/http'
+import { Injectable } from '@angular/core'
+import { map, Observable } from 'rxjs'
+import { environment } from 'src/environments/environment'
+
+export interface AppRemoteVersion {
+  version: string
+  update_available: boolean
+  feature_is_set: boolean
+}
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RemoteVersionService {
+  constructor(private http: HttpClient) {}
+
+  public checkForUpdates(): Observable<AppRemoteVersion> {
+    return this.http.get<AppRemoteVersion>(
+      `${environment.apiBaseUrl}remote_version/`
+    )
+  }
+}