README.md

Hadolint demo

Install Hadolint

https://github.com/hadolint/hadolint#install

Example

Запустим проверку

$ hadolint hadolint/Dockerfile.error

или

$ docker run --rm -i hadolint/hadolint < hadolint/Dockerfile.error

Результаты

-:3 DL3020 error: Use COPY instead of ADD for files and folders

-:4 DL3003 warning: Use WORKDIR to switch to a directory

-:5 DL3007 warning: Using latest is prone to errors if the image will ever update. Pin the version explicitly to a release tag

-:7 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.

Проверяем версию с исправлениями

$ docker run --rm -i hadolint/hadolint < hadolint/Dockerfile.fix

via: How to use a Dockerfile linter