Digital Signage Web App In HTML JS

How to create an offline-capable digital signage web app in HTML Javascript. == LINKS & CODE DOWNLOAD == https://code-boxx.com/digital-signage-html-javascript/ == CODE BOXX EBOOK STORE == https://payhip.com/codeboxx == CHAPTERS == 0:05 Basic Setup & Slides 1:00 Signage Landing Page 3:32 Offline & Storage Cache 6:56 Installable PWA