codemancer maps server

  /preview                      live overlay viewer (start here)
  /maps/                        downloadable map files (.obf/.zip)
  /tiles/status.json            live layer freshness + counts

  /tiles/all/{z}/{x}/{y}.png    ALL live layers in one overlay <- use this in OsmAnd
  /tiles/<layer>/{z}/{x}/{y}.png    single layer: vigicrues | atmo | trafic