Enhancing the Docker Acceptance Test Harness (ATH) by including cleanup steps after test completion to remove temporary files and prevent clutter in the environment.

Addition of  `rm -rf $(pwd)/acceptance-test-harness` to clean up temporary files created during the execution of the Docker Acceptance Test Harness (ATH). This cleanup step is crucial to maintain a tidy and resource-efficient environment after the tests have completed. By removing the acceptance-test-harness directory, it ensures that no leftover files clutter the workspace, preventing any potential interference with subsequent test runs or other processes that might rely on the environment.