[IMP][P0] Add examples/deploy reference pack (Docker, nginx, systemd)

[mishrapravin114]

Type

Implementation — merge a PR with runnable deploy artifacts. Not investigation.

Goal

Client DevOps can copy files from the repo to run EngineX in their VPC.

Files to create

examples/deploy/README.md
examples/deploy/docker/Dockerfile
examples/deploy/docker/docker-compose.yml
examples/deploy/nginx/enginex.conf.example
examples/deploy/systemd/engine-serve.service
examples/deploy/env/engine-serve.env.example
examples/deploy/STORAGE.md

Implementation checklist

• Dockerfile: Python 3.11, uv sync, ./engine entrypoint
• docker-compose: mount volume at /data/engine → ENGINE_HOME, expose :8787
• nginx example: TLS terminate → proxy 127.0.0.1:8787
• systemd unit for ./engine serve --host 127.0.0.1 --port 8787
• STORAGE.md: volume sizing, backup, ENGINE_HOME — no DB required
• Link examples/deploy/ from root README

Done when

• docker compose -f examples/deploy/docker/docker-compose.yml config succeeds
• README steps verified locally (build + up)
• PR merged to main

Out of scope

• Terraform / Helm
• Engine Cloud

Related (context only)

#13 deployment case study · #14 storage FAQ