Convert to template with dynamic configuration

Add comprehensive environment-based configuration system:
- Created config.js module to centralize all environment variables
- Updated server.js to use config module for all settings
- Added /api/config endpoint to expose company info to frontend
- Created init.js to dynamically inject config into HTML pages
- Updated .env.example with comprehensive configuration options
- Added data attributes to index.html for dynamic content
- Updated Dockerfile to include config.js

This allows users to customize:
- Company name, tagline, and description
- Branding colors (primary, accent, dark)
- Contact information (email, phone, address, hours)
- Social media links
- About page content
- Services offered

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

config.js

@@ -0,0 +1,96 @@
+// Configuration module for AI Recruitment Site Template
+// Centralizes all environment variable loading with sensible defaults
+
+const crypto = require('crypto');
+
+// Helper function to generate secure random strings
+function generateSecret(length = 64) {
+  return crypto.randomBytes(length).toString('hex');
+}
+
+// Company Information
+const company = {
+  name: process.env.COMPANY_NAME || 'Your Recruitment Firm',
+  tagline: process.env.COMPANY_TAGLINE || 'Finding the Perfect Match for Your Career',
+  description: process.env.COMPANY_DESCRIPTION || 'We specialize in connecting talented professionals with exceptional opportunities across various industries.'
+};
+
+// Branding Colors
+const branding = {
+  primaryColor: process.env.PRIMARY_COLOR || '#2563EB',
+  accentColor: process.env.ACCENT_COLOR || '#059669',
+  darkColor: process.env.DARK_COLOR || '#1E293B'
+};
+
+// Contact Information
+const contact = {
+  email: process.env.CONTACT_EMAIL || 'info@yourcompany.com',
+  phone: process.env.CONTACT_PHONE || '+1 (555) 123-4567',
+  address: process.env.CONTACT_ADDRESS || '123 Business St, Suite 100, City, State 12345',
+  businessHours: process.env.BUSINESS_HOURS || 'Monday - Friday: 9:00 AM - 6:00 PM'
+};
+
+// Social Media Links
+const social = {
+  linkedin: process.env.SOCIAL_LINKEDIN || '',
+  twitter: process.env.SOCIAL_TWITTER || '',
+  facebook: process.env.SOCIAL_FACEBOOK || ''
+};
+
+// Application Settings
+const app = {
+  nodeEnv: process.env.NODE_ENV || 'development',
+  port: parseInt(process.env.PORT || '3000', 10),
+  sessionSecret: process.env.SESSION_SECRET || generateSecret()
+};
+
+// Database Configuration
+const database = {
+  host: process.env.DB_HOST || 'localhost',
+  port: parseInt(process.env.DB_PORT || '5432', 10),
+  name: process.env.DB_NAME || 'recruitment',
+  user: process.env.DB_USER || 'postgres',
+  password: process.env.DB_PASSWORD || 'changeme123'
+};
+
+// Feature Configuration
+const features = {
+  maxCvSizeMB: parseInt(process.env.MAX_CV_SIZE_MB || '5', 10),
+  allowedCvTypes: (process.env.ALLOWED_CV_TYPES || 'application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document').split(',')
+};
+
+// About Page Content
+const about = {
+  mission: process.env.ABOUT_MISSION || 'Our mission is to bridge the gap between exceptional talent and outstanding opportunities.',
+  vision: process.env.ABOUT_VISION || 'We envision a world where every professional finds their perfect career match.',
+  values: process.env.ABOUT_VALUES || 'Integrity, Excellence, Innovation, Partnership'
+};
+
+// Services
+const services = {
+  list: (process.env.SERVICES_LIST || 'Executive Search,Contract Staffing,Permanent Placement,Career Consulting,Talent Assessment,Industry Expertise').split(',')
+};
+
+// Email Configuration
+const email = {
+  smtpHost: process.env.SMTP_HOST || '',
+  smtpPort: parseInt(process.env.SMTP_PORT || '587', 10),
+  smtpUser: process.env.SMTP_USER || '',
+  smtpPassword: process.env.SMTP_PASSWORD || '',
+  smtpFrom: process.env.SMTP_FROM || 'noreply@yourcompany.com',
+  contactFormRecipient: process.env.CONTACT_FORM_RECIPIENT || contact.email
+};
+
+// Export configuration object
+module.exports = {
+  company,
+  branding,
+  contact,
+  social,
+  app,
+  database,
+  features,
+  about,
+  services,
+  email
+};