TODO: Bongmusa to add files for pwa

add serviceworker.js (have code to install pwa to device) []

add manifest.json (add app names and link app icon images) []

add app icons (use https://canva.com/ to create a logo for the app *export logo in these sizes[48x48, 250x250, 512x512]) []

TODO: Azanda to add files for pwa

index.php (welcome screen)

about.php (what the app is about)

how-to-use.php (how to use the application incl. Installation guide)