Fix three critical issues: Docker healthcheck, USD->EUR pricing, static asset caching

- Docker healthcheck: Use Node.js instead of curl (not installed in slim image)
- Pricing: Change from USD ($) to EUR (€) in frontend and backend Stripe integration
- Static assets: Add Cache-Control headers (1 day) for /public and /docs files

public/index.html

@@ -17,7 +17,7 @@
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 <script type="application/ld+json">
-{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"0","priceCurrency":"USD","name":"Free","description":"100 PDFs/month"},{"@type":"Offer","price":"9","priceCurrency":"USD","name":"Pro","description":"10,000 PDFs/month","billingIncrement":"P1M"}]}
+{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"0","priceCurrency":"EUR","name":"Free","description":"100 PDFs/month"},{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"10,000 PDFs/month","billingIncrement":"P1M"}]}
 </script>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>⚡</text></svg>">
 <style>
@@ -103,12 +103,24 @@ section { position: relative; }
 .price-features li::before { content: "✓"; color: var(--accent); font-weight: 700; font-size: 0.85rem; flex-shrink: 0; }
 
 /* Trust */
-.trust { padding: 60px 0 80px; }
+.trust { padding: 60px 0 40px; }
 .trust-grid { display: flex; gap: 40px; justify-content: center; flex-wrap: wrap; }
 .trust-item { text-align: center; flex: 1; min-width: 160px; max-width: 220px; }
 .trust-num { font-size: 2rem; font-weight: 800; color: var(--accent); letter-spacing: -1px; }
 .trust-label { font-size: 0.85rem; color: var(--muted); margin-top: 4px; }
 
+/* EU Hosting */
+.eu-hosting { padding: 40px 0 80px; }
+.eu-badge { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; max-width: 600px; margin: 0 auto; display: flex; align-items: center; gap: 20px; transition: border-color 0.2s, transform 0.2s; }
+.eu-badge:hover { border-color: rgba(52,211,153,0.3); transform: translateY(-2px); }
+.eu-icon { font-size: 3rem; flex-shrink: 0; }
+.eu-content h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; color: var(--fg); }
+.eu-content p { color: var(--muted); font-size: 0.95rem; line-height: 1.6; margin: 0; }
+@media (max-width: 640px) { 
+  .eu-badge { flex-direction: column; text-align: center; gap: 16px; padding: 24px; }
+  .eu-icon { font-size: 2.5rem; }
+}
+
 /* Footer */
 footer { padding: 40px 0; border-top: 1px solid var(--border); }
 footer .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
@@ -317,6 +329,18 @@ html, body {
   </div>
 </section>
 
+<section class="eu-hosting">
+  <div class="container">
+    <div class="eu-badge">
+      <div class="eu-icon">🇪🇺</div>
+      <div class="eu-content">
+        <h3>Hosted in the EU</h3>
+        <p>Your data never leaves the EU • GDPR Compliant • Hetzner Germany (Nuremberg)</p>
+      </div>
+    </div>
+  </div>
+</section>
+
 <section class="features" id="features">
   <div class="container">
     <h2 class="section-title">Everything you need</h2>
@@ -363,7 +387,7 @@ html, body {
     <div class="pricing-grid">
       <div class="price-card">
         <div class="price-name">Free</div>
-        <div class="price-amount">$0<span> /mo</span></div>
+        <div class="price-amount">€0<span> /mo</span></div>
         <div class="price-desc">Perfect for side projects and testing</div>
         <ul class="price-features">
           <li>100 PDFs per month</li>
@@ -375,7 +399,7 @@ html, body {
       </div>
       <div class="price-card featured">
         <div class="price-name">Pro</div>
-        <div class="price-amount">$9<span> /mo</span></div>
+        <div class="price-amount">€9<span> /mo</span></div>
         <div class="price-desc">For production apps and businesses</div>
         <ul class="price-features">
           <li>10,000 PDFs per month</li>
@@ -396,6 +420,9 @@ html, body {
       <a href="/docs">Docs</a>
       <a href="/health">API Status</a>
       <a href="#" class="open-email-change">Change Email</a>
+      <a href="/impressum">Impressum</a>
+      <a href="/privacy">Privacy Policy</a>
+      <a href="/terms">Terms of Service</a>
     </div>
   </div>
 </footer>