Docker image for DeepSeek Harness

Key features

• Docker template for running the DeepSeek Harness Web UI.
• Every docker compose up rebuilds the dsh service and installs @deepseek-ai/dsh@latest.
• Public deployment requires a DNS record, a TLS certificate, Nginx, and a reverse proxy.
• The image applies a guarded compatibility patch to the browser client so the authenticated reverse proxy can expose the settings document.
• The patch fails the build when the upstream client shape changes and requires a deliberate compatibility review.