Add data providers

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

@@ -107,6 +107,16 @@
           </ol>
         </mat-card-content>
       </mat-card>
+      <mat-card appearance="outlined" class="mb-3">
+        <mat-card-header>
+          <mat-card-title>Which data providers are supported?</mat-card-title>
+        </mat-card-header>
+        <mat-card-content
+          ><code>COINGECKO</code>, <code>MANUAL</code> and
+          <code>YAHOO</code> are officially supported while all other data
+          providers are considered experimental.</mat-card-content
+        >
+      </mat-card>
       <mat-card appearance="outlined" class="mb-3">
         <mat-card-header>
           <mat-card-title>Which devices are supported?</mat-card-title>