Mission-control: Complete `.env.example` and the real Dockerfile build steps so the image builds

[mattdani21]

Task (from GOAL.md)

Complete .env.example and the real Dockerfile build steps so the image builds

Task index: 4
Milestone: M1 — Bootstrap the v1 application

Acceptance criteria

• Task intent implemented per GOAL.md milestone definition of done: scripts/launch/audit.sh reports 0 critical gaps and the launch-readiness workflow is green on main.
• Test command from STATE.md passes: NONE (no test framework yet — task includes setting one up)
• No secrets/.env touched; no force-push; no direct pushes to main
• Branch orch/<issue>-<slug> with a PR titled with the task

Confirmed goal

Launch Mission Control as the live marketing-operations hub for Empyrean (target: launch this week)

Gate

NONE (no test framework yet — task includes setting one up)