Replace static Hello World with KenJim Technologies React app

- Vite + React frontend: hero, services grid, contact form
- Express + nodemailer backend for contact form → kenji@kenjim.com
- Multi-stage Docker builds; nginx inside frontend proxies /api to backend
- SMTP config via .env (see .env.example)

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

frontend/nginx.conf

@@ -0,0 +1,18 @@
+server {
+    listen 80;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # SPA routing — return index.html for all non-file routes
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Proxy API calls to the backend container
+    location /api/ {
+        proxy_pass         http://api:3001/;
+        proxy_set_header   Host              $host;
+        proxy_set_header   X-Real-IP         $remote_addr;
+        proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
+    }
+}