Add 'linux/desktop/README.md'

linux/desktop/README.md

@@ -0,0 +1,5 @@
+```
+flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+flatpak remote-ls
+while read app; do sudo flatpak install -y flathub $app; done < flatpak-list.txt
+```