added info to package.json

package.json

 {
   "name": "lidarviz-backend",
+  "repository": "https://gitlab.informatik.hu-berlin.de/vakoeis/lidarwebvisualization-testbackend.git",
+  "license": "WTFPL",
   "version": "0.0.1",
   "description": "Dummy backend to send socketio data",
   "dependencies": {