...via <script src="https://openlayers.org/api/OpenLayers.js"></script>
Not sure if in scope of Maps or only VPS-Projects.
See also T172065 (though that is for Tools).
right, i was still in the process of swithing this thing to leaflet
Note that this thing isn't really meant to be used in the first place ;)
It's more a test page for the tiles renderer, and people tend to embed the maps directly