Improve beta install instructions

Author: razzeee

src/components/application/CmdInstructions.tsx

@@ -12,7 +12,16 @@ const CmdInstructions = ({ appId, isStable }: { appId: string, isStable: boolean
         </a>{' '}
         before installing
       </p>
-      {isStable ? (<CodeCopy text={`flatpak install flathub ${appId}`}></CodeCopy>) : (<CodeCopy text={`flatpak install flathub-beta ${appId}`}></CodeCopy>)}
+
+      {isStable ? (<CodeCopy text={`flatpak install flathub ${appId}`}></CodeCopy>) : (<>
+        <p>This is a beta version, so you will need to have the flathub-beta repo setup</p>
+        <CodeCopy text={`flatpak remote-add --if-not-exists flathub-beta https://flathub.org/beta-repo/flathub-beta.flatpakrepo`}></CodeCopy>
+        <p>
+          Then install the app with:
+        </p>
+        <CodeCopy text={`flatpak install flathub-beta ${appId}`}></CodeCopy>
+      </>
+      )}
       <h3>Run</h3>
       <CodeCopy text={`flatpak run ${appId}`}></CodeCopy>
     </div>