Add mapbox tiles api support

[1a57danc3]

User need edit mapbox api token in server.py.

[1a57danc3]

1. Apply mapbox account first.
2. Go to https://account.mapbox.com/access-tokens/ , find and copy your token.
3. Edit src/server.py, the line 67, paste your token to the end.

For example:

return f"https://{server}/v4/mapbox.satellite/{level_of_detail}/{tile_x}/{tile_y}.jpg?sku=101AdikDMLlCK&access_token=pk.ey1234567890oiY2syc3Zod21234567890NHFkZSJ9.eChSWdg1CZBnQCwQi3xz0Q"

4. Save the src/server.py.
5. Run as administrator with run.bat in root folder, and server list choose api.mapbox.com.