Verifies that the user's app is containerized and that an image exists in a registry the cluster can pull from, before deploying. Use when the user wants to deploy something but you don't yet know if they have a Dockerfile or a pushed image, or when the deploy-app skill needs an image reference and doesn't have one yet.
$npx -y skills add intility/for-developers-plugin --skill prepare-appInstalls into the current project.
Run `npx skills use "https://github.com/intility/for-developers-plugin" --skill "intility/for-developers-plugin/prepare-app"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/intility/for-developers-plugin" that are relevant to the current task. Run `npx skills add "https://github.com/intility/for-developers-plugin"` and select the relevant skills, then follow their instructions.