Do a PWA Audit with Lighthouse using Chrome Dev Tools

Chrome has a built-in audit tool called Lighthouse that we can use to give a readiness score to our web app. We'll run the progressive web app test, and interpret the results.

In particular, it's essential that a PWA gets run over HTTPS in production - otherwise, it won't work as a PWA at all.

Also, it's important to recognize the many differences in how PWAs operate between Android and iOS - and to manually test in each browser that you plan to support.