Unfortunately, dev.to does not display the ID of the blog post on the page. So once it's created, you can open your browser console (Usually F12 OR 'Option + ⌘ + J' (on macOS), or 'Shift + CTRL + J' (on Windows/Linux)) and paste the following code to retrieve the blog post ID:
$('div[data-article-id]').getAttribute('data-article-id')
If anyone knows of an easier way please help by submitting a PR here. 😄

• Install Yarn and navigate to the repo root. Run Yarn to download node_modules and dependencies described in package.json. This will also update / create yarn.lock

• package.json also contains some scripts that can then be run locally for prettier and embedme. Also used in the Github Action when a post is published