(actually Image Viewer, but who cares?)
Nope. Pure html, css, js and json.
python -m http.server
or
npx http-server
{
"maps": {
"map id": // used in Query param "?map={map id}"
{
"name": "map name",
"url": "map url", // internal or external
"labels": // not required
[
{"name": "name", "size": 12, "x": 0, "y": 0}
]
}
}
"main": "id of main map" // will be used if Query param map is undefined
}