Demo and product page for Klarbild

A static Astro page. The sheet playground imports the print engine
(printlayout.ts, paper.ts) verbatim from the Klarbild repository and runs it in
the browser, so the layout on screen is the application's own arithmetic rather
than a mock-up. The PDF it offers is drawn from the same placements with pdf-lib.

No backend, nothing uploaded, no third-party requests.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nh4A79bbqT9dcd2inzYUdg

nginx.conf

@@ -0,0 +1,29 @@
+server {
+  listen 80;
+  server_name _;
+  root /usr/share/nginx/html;
+  index index.html;
+
+  # Hashed asset file names, so they can be cached hard. The HTML is not hashed
+  # and must not be, or a redeploy would go unnoticed for a year.
+  location /_astro/ {
+    add_header Cache-Control "public, max-age=31536000, immutable";
+    try_files $uri =404;
+  }
+  location = /index.html {
+    add_header Cache-Control "no-cache";
+  }
+
+  # This page loads nothing from anywhere else, so it can say so.
+  add_header X-Content-Type-Options "nosniff" always;
+  add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+  add_header X-Frame-Options "DENY" always;
+  add_header Content-Security-Policy "default-src 'self'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; font-src 'self'; connect-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'" always;
+
+  gzip on;
+  gzip_types text/css application/javascript image/svg+xml application/json;
+  gzip_min_length 1024;
+
+  location / { try_files $uri $uri/ /index.html; }
+  error_page 404 /index.html;
+}