Add landing page, tests, Docker deployment, nginx config

deploy/nginx.conf

@@ -0,0 +1,38 @@
+# Nginx reverse proxy config for DocFast
+# Place in /etc/nginx/sites-available/docfast.conf and symlink to sites-enabled
+# Requires: certbot for SSL (or existing wildcard cert)
+
+server {
+    listen 80;
+    server_name api.docfast.dev;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name api.docfast.dev;
+
+    # SSL certs (adjust paths)
+    ssl_certificate /etc/letsencrypt/live/api.docfast.dev/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/api.docfast.dev/privkey.pem;
+
+    # Security headers
+    add_header X-Frame-Options DENY;
+    add_header X-Content-Type-Options nosniff;
+    add_header X-XSS-Protection "1; mode=block";
+
+    # Max body size (HTML/Markdown input)
+    client_max_body_size 2m;
+
+    location / {
+        proxy_pass http://127.0.0.1:3100;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # PDF responses can be large
+        proxy_read_timeout 30s;
+        proxy_buffering off;
+    }
+}