Related forum thread:
https://forums.raspberrypi.com/viewtopic.php?t=336998
Install a MicroPython that supports Pico-W:
https://micropython.org/download/rp2-pico-w/
Then install ampy.
Then copy all needed files onto Pico-W by running "install" in "MicroPython/I Pico W LED web server".
Afterwards power cycle the Pico-W. When connected to its AP (192.168.4.X), use 192.168.4.1 in your browser:
http://192.168.4.1
This will serve planar_graph_playground from Pico-W, which is available here as well:
https://hermann-sw.github.io/planar_graph_playground/
Pico-W being an AP allows to use planar_graph_playground without any wireless lan.
"index.html" referencs 7 external .js files, and webserver serves "Pico-W" favicon.ico as well.
(Currently there is a single file size limit of 6536 bytes that can be served, because of a MicroPython "file.read()" bug)