Root cause: Dockerfile build context is ./app/ but VERSION file is at
repo root, so it's excluded from the Docker image. The context processor
tried parent.parent.parent which resolves to / inside the container.
Fix:
- Context processor now checks APP_VERSION env var first, then tries
multiple file paths (repo root for local dev, app/ dir for Docker)
- Dockerfile accepts APP_VERSION build arg and sets it as ENV
- compose.yml passes APP_VERSION build arg to all service builds
Note: Deploy script needs `export APP_VERSION=$(cat VERSION)` before
docker-compose build for the build arg to pick up the version.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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