troubleshooting

How can I lint a Dockerfile to improve its quality and professionalism?

I received feedback to lint my Dockerfile for better quality and professionalism. How can I achieve this?

Ri

Rick Otten

Asked on Sep 15, 2023

  1. Use a linter tool like Hadolint to analyze and improve the Dockerfile.

  2. Address the warnings and info messages provided by the linter tool.

  3. Pin versions in apt-get install commands.

  4. Delete the apt-get lists after installing something.

  5. Avoid additional packages by specifying --no-install-recommends.

  6. Set the SHELL option -o pipefail before RUN with a pipe in it.

  7. Use WORKDIR to switch to a directory.

  8. Avoid brace expansion in POSIX sh.

  9. Make necessary changes based on the linting recommendations to enhance the Dockerfile quality and professionalism.

Sep 21, 2023Edited by