Initial commit: static site + Docker setup for Marszalek Architekten

- Single-page HTML website (no CMS) with portfolio grid, services,
  team and contact sections; content extracted from marszalekarchitekten.at
- 2-page PDF info sheet generated via Puppeteer from HTML template
- nginx:alpine Docker image with custom nginx.conf (caching, gzip, headers)
- docker-compose.yml for Portainer deployment on port 3080

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nginx.conf

@@ -0,0 +1,36 @@
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+    charset utf-8;
+
+    # Security headers
+    add_header X-Content-Type-Options "nosniff";
+    add_header X-Frame-Options "SAMEORIGIN";
+    add_header Referrer-Policy "strict-origin-when-cross-origin";
+
+    # HTML — no cache (easy updates)
+    location = /index.html {
+        add_header Cache-Control "no-cache, must-revalidate";
+        add_header X-Content-Type-Options "nosniff";
+    }
+
+    # PDF — short cache, force download header
+    location ~* \.pdf$ {
+        add_header Content-Disposition "attachment";
+        add_header Cache-Control "public, max-age=86400";
+        add_header X-Content-Type-Options "nosniff";
+    }
+
+    # Static assets — long cache
+    location ~* \.(js|css|woff2?|png|jpg|jpeg|svg|ico|webp)$ {
+        expires 30d;
+        add_header Cache-Control "public, max-age=2592000, immutable";
+    }
+
+    # Gzip
+    gzip on;
+    gzip_types text/html text/css application/javascript application/json image/svg+xml;
+    gzip_min_length 1024;
+}