Added Service Worker for Offline First Capabilities

[adnanusman]

I've added an enhancement to this already amazing game. The game will now have offline capabilities and will be entirely cached inside the browser in case user is offline or is on a bad connection. The game will load super fast and the user experience will be much better.

[themichaelyang]

Hi! Thanks for this contribution. Have you tested this code? I'll take a look at it soon.

[adnanusman]

Hi, thank you very much for the response. Yes, I have tested it and have a working version up here for display: https://adnanusman.com/hextris-sw/

[nstringham]

this PR has some conflicts I have created a fix here adnanusman#1

[lengstrom]

Hi Nate would you want to take a more active role in maintaining this project? Looks like you've been pretty involved in PRs and honestly I haven't had the time to take care of Hextris anymore so let me know if you would be interested!

[nstringham]

Hi Nate would you want to take a more active role in maintaining this project? Looks like you've been pretty involved in PRs and honestly I haven't had the time to take care of Hextris anymore so let me know if you would be interested!

I'm just passing by, not looking for any long term commitments. But feel free to ping me if you want any help with web app stuff and I'll try to help if I have time.