feat: V1.0.1 - Setup page, Docker, README

Add password-protected setup page (/api/setup) for DB initialization,
admin creation, and demo data seeding. Dockerize the full stack with
server, client, nginx reverse proxy, and MySQL services. Add project
README with architecture overview, quick start, and VPS deployment guide.

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

.env.example

@@ -25,6 +25,14 @@ API_SERVER_URL=http://localhost:8000
 UPLOAD_DIR=server/uploads
 MAX_UPLOAD_SIZE_MB=50
 
+# --- Setup Page ---
+SETUP_PASSWORD=  # Password per /api/setup, vuoto = disabilitato
+
+# --- Docker ---
+DB_ROOT_PASSWORD=root_password_change_me
+NGINX_PORT=80
+NGINX_SSL_PORT=443
+
 # --- HTTPS (Production) ---
 # SSL_CERTFILE=/path/to/cert.pem
 # SSL_KEYFILE=/path/to/key.pem