## Summary
Fixes the Docker build failure at step 30/30:
```
fatal: not a git repository (or any of the parent directories): .git
```
## Root Cause
`.dockerignore` excludes `.git/`, so `COPY . $APP_DIR` never copies the `.git` directory into the image. However, the final `RUN` step unconditionally runs `git clean -xdf`, which requires a git repository to exist.
## Fix
Wrapped `git clean -xdf` and `rm -rf .git` in a conditional that checks for `.git` directory existence first, falling through silently when absent:
```dockerfile
([ -d .git ] && git clean -xdf && rm -rf .git || true)
```
This makes the Dockerfile work correctly whether `.git` is present (e.g., if `.dockerignore` is modified) or absent (current behavior).
## Quality Gates
| Gate | Result |
|------|--------|
| lint | Pass |
| typecheck | Pass (0 errors) |
| pre-commit hooks | Pass |
(Dockerfile-only change — no Python code modified, so unit/integration tests are unaffected.)
Closes#1233
Reviewed-on: #1234
Reviewed-by: Luis Mendes <luis.mendes@cleverthis.com>
Co-authored-by: Brent E. Edwards <brent.edwards@cleverthis.com>
Co-committed-by: Brent E. Edwards <brent.edwards@cleverthis.com>
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