Ignore changelog folder in markdown linting

[adamconnelly]

• Updated the markdownlint command to ignore the changelog folder.
• Re-added the check into the pipeline.

Fixes #775

@tomkerkhove for now I've just configured it to ignore the entire changelog folder because when I just ignored changelog/themes there were linting errors in some of the other files, and I wasn't sure if they were generated or not. If you pull down the branch you can easily try it out by changing the --ignore changelog to --ignore changelog/themes in the package.json file, and then just run npm run markdownlint to run the checks.

[promitor-bot]

Docker image for this PR was built and is available on Docker Hub.

You can pull it locally via the CLI:

docker pull tomkerkhove/promitor-agent-scraper-ci:pr777

Want to verify the new version? Run it locally:

docker run -d -p 8999:80 --name promitor-agent-scraper-pr777 \
                         --env PROMITOR_AUTH_APPID='<azure-ad-app-id>' \
                         --env-file C:/Promitor/az-mon-auth.creds \
                         --volume C:/Promitor/metrics-declaration.yaml:/config/metrics-declaration.yaml  \
                         --volume C:/Promitor/runtime-config.yaml:/config/runtime.yaml \
                         tomkerkhove/promitor-agent-scraper-ci:pr777

You can find a CI version of our Helm chart on hub.helm.sh

[tomkerkhove]

Awesome, now I feel like a moron for not finding that myself!

[adamconnelly]

Haha - no worries!