dockercompose and dockerimage are selectable in the UI but silently run the nixpacks strategy

[Alimedhat000]

Summary

The web UI lets users pick dockercompose and dockerimage build packs, but the worker pipeline only branches on dockerfile vs. everything-else → nixpacks. Selecting either pack silently runs the nixpacks strategy.

Evidence

• web/src/components/BuildPackSelector.tsx:15,21 — dockercompose / dockerimage options.
• packages/worker/src/deployments/pipeline.ts:76 — if (app.buildPack === "dockerfile") { ... } else { nixpacks }.
• packages/shared/src/constants/build-pack.ts lists all four packs.

Options

• Implement dockercompose (dockercompose build pack — deploy multi-service stacks via Docker Compose #28) and dockerimage (dockerimage build pack — pull pre-built image and run as long-lived container #27), or
• Remove them from the selector until implemented so users can't pick a pack that silently misbehaves.