Main Demo might not be working?

**Describe the bug**

The image I see when visiting the main demo looks like it could be an error.

**To Reproduce**

At https://geotiff.github.io/georaster-layer-for-leaflet-example/ I see:


Is this what it is supposed to look like?

**Expected behavior**

I expected an ortho or satellite image of some interesting place in the world, possibly with enough detail and/or large enough to show how this is a COG image and not your old school web jpeg or png tile cache.

**Screenshots**
_..see above.._

**Desktop (please complete the following information):**
- OS: Windows 10
- Browser: Firefox
- Version: 99

Start by opening the demo URL and inspecting the rendered map and its source configuration. Compare the displayed image with the expected ortho or satellite imagery described in the issue; done means the demo either shows the intended COG imagery or the issue is clarified with a confirmed explanation of the current output.

Written by the indexing model from the issue text.