# SP-404MK2 layers (PWA)

Static files only. Serve this folder over HTTPS (required for install and offline).

Quick options:
- Nginx container behind Nginx Proxy Manager: mount this folder at /usr/share/nginx/html.
- `docker run -d --name 404layers -p 8404:80 -v $PWD:/usr/share/nginx/html:ro nginx:alpine`, then add a proxy host in NPM with a Let's Encrypt cert.
- Any static host (Cloudflare Pages, GitHub Pages).

On the phone: open the URL in Chrome, menu, "Install app" / "Add to Home screen".

Updating: edit files, bump `V` in sw.js, redeploy. The page is fetched network-first, so it updates on next open when online.