Add tags

CloudronManifest.json

@@ -30,5 +30,6 @@
     "http://gogs.io/imgs/screenshoots/1.png",
     "http://gogs.io/imgs/screenshoots/2.png",
     "http://gogs.io/imgs/screenshoots/5.png"
-  ]
+  ],
+  "tags": [ "version control", "git", "code hosting", "development" ]
 }