@DavidDarnes The drag and drop only deploys the assets you drop there... for a build to run, you need to link to a repo.
Or you can run your build locally and push the output to Netlify via the API.
https://www.netlify.com/docs/cli/
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.