Add question about mobile app

apps/client/src/app/pages/faq/self-hosting/self-hosting-page.html

@@ -148,6 +148,21 @@
           and desktop computers.</mat-card-content
         >
       </mat-card>
+      <mat-card appearance="outlined" class="mb-3">
+        <mat-card-header>
+          <mat-card-title
+            >Is there a mobile app for the self-hosting version of Ghostfolio
+            available in the app store?</mat-card-title
+          >
+        </mat-card-header>
+        <mat-card-content
+          >No, there is no mobile app for the self-hosting version of Ghostfolio
+          available in the app store. However, you can add the web app to your
+          home screen (e.g. by selecting <i>Add to Home screen</i> in
+          <i>Google Chrome</i>), which provides the same user
+          experience.</mat-card-content
+        >
+      </mat-card>
       <mat-card appearance="outlined" class="mb-3">
         <mat-card-header>
           <mat-card-title