(actually Image Viewer, but who cares?)
python -m http.server
or
npx http-server
{
"maps": {
"map id":
{
"name": "map name",
"url": "map url (internal or external)",
"labels":
[
{"name": "name", "size": 12, "x": 0, "y": 0}
]
}
}
"main": "id of main map"
}