[IpV8]

I've done similar things with python/flask. My experienced tip, if you try to do an ad hoc network and have people connect to that without passing the internet through, prepare to get f'd by apple: https://discussions.apple.com/thread/7705927?page=3

If you want to host it on the lan just play with IPtables to get your port through and host a little web server. Shouldn't be too complicated. Look in to gunicorn for a production capable flask server. I have used Monit to keep gunicorn alive as a second line of defense. You could use init instead if you prefer.

If this is over your head let me know and I can break it down to more detail.