Add marketing site for makeyourown.website

Static single-page marketing site with dark theme, 3-tier pricing,
LLM/agent SEO (llms.txt), and deployment setup that overlays onto
the existing WebsiteBox nginx via docker-compose.override.yml
without modifying any core project files.

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

website/deploy/marketing.conf

@@ -0,0 +1,18 @@
+# Marketing site — HTTP server block (pre-SSL)
+# Serves static files and handles ACME challenges for certificate acquisition
+# Replaced by marketing-ssl.conf once SSL is acquired
+
+server {
+    listen 80;
+    server_name MARKETING_DOMAIN_PLACEHOLDER;
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    location / {
+        root /var/www/marketing;
+        index index.html;
+        try_files $uri $uri/ =404;
+    }
+}