- Mount GitHub environment files directory containing GITHUB_ENV, GITHUB_OUTPUT, GITHUB_PATH, and GITHUB_STEP_SUMMARY
- Resolves Docker container exit code -1 when writing to $GITHUB_ENV
- Update volume mapping in both step execution contexts in engine.rs
- Tested on macOS with Docker Desktop
Closes: Issue where echo "VAR=value" >> "$GITHUB_ENV" fails in Docker runtime