Step-by-step deployment guide covering three paths: Docker Compose
on a single VM, Kubernetes via the existing Helm chart, and Google
Cloud Run / serverless. Includes a full environment variables
reference, GeoIP CDN header configuration table (Cloudflare, Vercel,
GCP, AWS, custom), banner integration checklist, and troubleshooting
section covering common issues seen during the dev deployment
(async loader race, CORS, scanner PORT leak, blocker bridge).
