How to Install PWA in the Backend

I'm testing on iOS 12.1.1.

The PWA installed at https://www.tmssoftware.com/pwa/calculator.html works perfect.

I would like to make one to work that way.

I compiled and installed the PWACalculator sample. I installed on Windows IIS and CentOS with Apache.

Problems:
- In IIS the screen does not fill up. Using HTTPS.
"The logo does not appear at all. No HTTPS.

I could provide an example and pass the stones path to install on Windows and Linux.

For a PWA to be recognized, it needs to be accessed via HTTPS and there needs to be HTTP to HTTPS redirection.
https://developers.google.com/web/tools/lighthouse/audits/http-redirects-to-https

Other than this, check  out with the Lighthouse tool to see if there might other things wrong