Coolify builds with --project-directory set to the repo root, which broke
the dev compose file's relative paths. Adds a dedicated prod compose stack
(baked-in code, no bind mounts, no hardcoded secrets, static Nuxt build
served by nginx) so local dev and Coolify no longer share fragile path
assumptions.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
