#885 add enviroment variable for media viewer

src/environments/environment.common.ts

@@ -217,4 +217,9 @@ export const environment: GlobalConfig = {
   },
   // Whether the UI should rewrite file download URLs to match its domain. Only necessary to enable when running UI and REST API on separate domains
   rewriteDownloadUrls: false,
+  mediaViewer: {
+    enable: true,
+    image: true,
+    video: true,
+  },
 };