Add PWA support to generated project

[budda]

How to guide explains the requirements https://gamedevacademy.org/phaser-progressive-web-apps-tutorial/

[rblopes]

Hi again.

This is achievable by integrating offline-plugin on the workflow. I think most of the details are sorted out, but I haven't tried offline-plugin in ages, last time it wasn't compatible with Webpack 4. Will check again when I've got some time.

Combined with Phaser's (upcoming) Scale Manager, it would be a perfect match for a PWA game template.