fix(website): replace placeholder email with real contact address

fix(website): update APK download link to Cachy-v1.0.0-arm64-v8a.apk

website: add 'Try on web' CTA, fix mobile demo scroll

website: add Cloudflare static-assets config, point URLs at workers.dev

fixed site deployment

added apk

made some changes in the website.

added the website for app.