The image is for running markdownlint, markdownlint is installed in /app/ in case you need to customize the install before usage. The image is based on ruby:2.6.5-alpine3.10
More information about rules and configuration could be found here: Docs
markdownlint:
stage: linting
image: registry.gitlab.com/pipeline-components/markdownlint:latest
script:
- mdl --style all --warnings .