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>

scripts/healthcheck.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+set -eo pipefail
+
+# WebsiteBox Health Check
+# Usage: ./scripts/healthcheck.sh
+
+echo "═══════════════════════════════════════════════════════════"
+echo " WebsiteBox Health Check"
+echo "═══════════════════════════════════════════════════════════"
+
+ALL_HEALTHY=true
+
+for service in nginx wordpress db; do
+    container="websitebox-${service}"
+    status=$(docker inspect --format='{{.State.Health.Status}}' "$container" 2>/dev/null || echo "not found")
+
+    case "$status" in
+        healthy)
+            echo "  [OK]    ${service}: healthy"
+            ;;
+        unhealthy)
+            echo "  [FAIL]  ${service}: unhealthy"
+            ALL_HEALTHY=false
+            ;;
+        starting)
+            echo "  [WAIT]  ${service}: starting..."
+            ;;
+        *)
+            echo "  [????]  ${service}: ${status}"
+            ALL_HEALTHY=false
+            ;;
+    esac
+done
+
+# Certbot doesn't have a healthcheck — just check if running
+certbot_state=$(docker inspect --format='{{.State.Status}}' websitebox-certbot 2>/dev/null || echo "not found")
+if [ "$certbot_state" = "running" ]; then
+    echo "  [OK]    certbot: running"
+else
+    echo "  [WARN]  certbot: ${certbot_state}"
+fi
+
+echo ""
+
+if [ "$ALL_HEALTHY" = true ]; then
+    echo "All services are healthy."
+    exit 0
+else
+    echo "Some services are not healthy. Check logs with:"
+    echo "  docker compose logs -f [service]"
+    exit 1
+fi