update description

README.md

-# SmartVillages2
+# SmartVillages2 VCMap Plugin
+
+This plugin enables to place glTF/glb models in VCMap. It can also hide existing buildings to make space for a new object.
+
+It works without connecting to other servers, the inserted models stay on the local computer and are not transferred over the internet.
+The plugin also has an interface to a converter service which can convert IFC files to glb models. This will require the IFC file to be sent
+to the service. It will be temporarily stored on the server and will be deleted on the server after the conversion process is completed.
 
 
 ## Plugin Configuration
@@ -18,4 +24,18 @@ The instructions property can be a link to a pdf or html or anything else.
       "instructions": "<Link to a instructions document>"
     }
   ],
+```
+
+## Building / Packaging
+
+The plugin can be built with:
+
+```
+npx plugin build
+```
+
+To package for uploading in VCPublisher
+
+```
+npx plugin pack
 ```
\ No newline at end of file