baptisten-hohenacker_manual/user/themes/church/hebe.json

{
   "project":"grav-theme-bootstrap",
   "platforms":{
      "grav":{
         "nodes":{
            "theme":[
               {
                  "source":"/",
                  "destination":"/user/themes/bootstrap"
               }
            ]
         }
      }
   }
}