Initial commit: complete WebsiteBox project

Docker-based self-hosted WordPress deployment system with:
- Four-container stack (nginx, wordpress/php-fpm, mariadb, certbot)
- Automatic SSL via Let's Encrypt with self-signed fallback
- First-boot WordPress setup via WP-CLI (GeneratePress + child theme, plugins)
- Interactive setup wizard and one-line install script
- Backup, update, healthcheck, and SSL renewal scripts

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

.env.example

@@ -0,0 +1,69 @@
+# WebsiteBox Configuration
+# Copy this file to .env and fill in your values:
+#   cp .env.example .env
+# Or run the setup wizard:
+#   ./setup.sh
+
+# =============================================================================
+# REQUIRED — Domain & Admin
+# =============================================================================
+
+# Your domain name (e.g., example.com)
+DOMAIN=example.com
+
+# WordPress site title
+SITE_TITLE=My Portfolio
+
+# WordPress admin credentials
+ADMIN_USER=
+ADMIN_EMAIL=
+ADMIN_PASSWORD=
+
+# =============================================================================
+# DATABASE — Auto-generated by setup.sh (do not edit manually)
+# =============================================================================
+
+DB_NAME=websitebox
+DB_USER=websitebox
+DB_PASSWORD=
+DB_ROOT_PASSWORD=
+
+# =============================================================================
+# AGE GATE
+# =============================================================================
+
+# Enable age verification gate (true/false)
+AGE_GATE_ENABLED=true
+
+# Minimum age (18-21)
+AGE_GATE_MIN_AGE=18
+
+# =============================================================================
+# EMAIL (Optional) — SMTP relay for WordPress emails
+# =============================================================================
+
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_USER=
+SMTP_PASS=
+SMTP_FROM=
+
+# =============================================================================
+# BACKUPS
+# =============================================================================
+
+# Days to keep local backups (1-365)
+BACKUP_RETENTION_DAYS=30
+
+# =============================================================================
+# WORDPRESS SALTS — Auto-generated by setup.sh (do not edit manually)
+# =============================================================================
+
+AUTH_KEY=
+SECURE_AUTH_KEY=
+LOGGED_IN_KEY=
+NONCE_KEY=
+AUTH_SALT=
+SECURE_AUTH_SALT=
+LOGGED_IN_SALT=
+NONCE_SALT=