Add basic demo SPA to display claims

example/demo/workers-site/.gitignore

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+node_modules
+dist
+worker

example/demo/workers-site/index.js

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+import { getAssetFromKV, mapRequestToAsset } from '@cloudflare/kv-asset-handler'
+
+const DEBUG = false
+
+addEventListener('fetch', event => {
+  event.respondWith(handleEvent(event))
+})
+
+async function handleEvent(event) {
+  let options = {}
+  options.mapRequestToAsset = spaRouting()
+  options.cacheControl = {
+    bypassCache: DEBUG,
+  }
+
+  try {
+    const page = await getAssetFromKV(event, options)
+    const response = new Response(page.body, page)
+    response.headers.set('X-XSS-Protection', '1; mode=block')
+    response.headers.set('X-Content-Type-Options', 'nosniff')
+    response.headers.set('X-Frame-Options', 'DENY')
+    response.headers.set('Referrer-Policy', 'unsafe-url')
+    response.headers.set('Feature-Policy', 'none')
+    return response
+  } catch (e) {
+    return new Response(e.message || e.toString(), { status: 500 })
+  }
+}
+
+function spaRouting() {
+  return request => {
+    let defaultAssetKey = mapRequestToAsset(request)
+    let url = new URL(defaultAssetKey.url)
+    if (url.pathname.includes(".html")) {
+      url.pathname = "/index.html"
+    }
+    return new Request(url.toString(), defaultAssetKey)
+  }
+}

example/demo/workers-site/package.json

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+{
+  "private": true,
+  "version": "1.0.0",
+  "description": "A template for kick starting a Cloudflare Workers project",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "@cloudflare/kv-asset-handler": "~0.1.2"
+  }
+}