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>

backend/server.js

@@ -0,0 +1,48 @@
+const express = require('express')
+const nodemailer = require('nodemailer')
+const cors = require('cors')
+
+const app = express()
+app.use(cors())
+app.use(express.json())
+
+const transporter = nodemailer.createTransport({
+  host: process.env.SMTP_HOST,
+  port: parseInt(process.env.SMTP_PORT || '587'),
+  secure: process.env.SMTP_SECURE === 'true',
+  auth: {
+    user: process.env.SMTP_USER,
+    pass: process.env.SMTP_PASS,
+  },
+})
+
+app.post('/contact', async (req, res) => {
+  const { name, email, service, message } = req.body
+
+  if (!name || !email || !message) {
+    return res.status(400).json({ error: 'Name, email, and message are required.' })
+  }
+
+  try {
+    await transporter.sendMail({
+      from: `"KenJim Technologies" <${process.env.SMTP_USER}>`,
+      to: process.env.CONTACT_TO,
+      replyTo: email,
+      subject: `[kenjim.com] ${service || 'General Inquiry'} — ${name}`,
+      text: `Name: ${name}\nEmail: ${email}\nService: ${service || 'General Inquiry'}\n\n${message}`,
+      html: `
+        <p><strong>Name:</strong> ${name}</p>
+        <p><strong>Email:</strong> <a href="mailto:${email}">${email}</a></p>
+        <p><strong>Service:</strong> ${service || 'General Inquiry'}</p>
+        <hr/>
+        <p>${message.replace(/\n/g, '<br>')}</p>
+      `,
+    })
+    res.json({ ok: true })
+  } catch (err) {
+    console.error('Mail error:', err)
+    res.status(500).json({ error: 'Failed to send message. Please try again.' })
+  }
+})
+
+app.listen(3001, () => console.log('API listening on :3001'))