## Summary
- Fixes#1349: `Template.fromDockerfile` (JS) and
`Template.from_dockerfile` (Python) silently dropped intermediate
sources from multi-source `COPY`/`ADD`, keeping only the first one and
producing broken images without warning.
- Both parsers now emit one `copy()` call per source to the same
destination (matching Docker semantics), preserving `--chown` across all
calls.
- Added tests in both SDKs (multi-source COPY, and multi-source COPY
with `--chown`), plus changesets for `e2b` and `@e2b/python-sdk`.
## Test plan
- [x] `pnpm run test tests/template/methods/fromDockerfile.test.ts` (JS)
- [x] `poetry run pytest
tests/{async,sync}/template_*/methods/test_from_dockerfile.py` (Python)
- [x] `pnpm run format` / `pnpm run lint`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Mish Ushakov