meetgrowtharbor/first-app-nextjs ? reverse-engineered prompt

Build me a simple Next.js starter app that runs locally on port 3000 and shows a clean homepage with a friendly welcome message, a short intro, and a couple of links or buttons that look polished on desktop and mobile.

Please keep it lightweight and modern, using the standard app structure this project already has. Make sure the page works well with the default development setup, and that the code is easy to edit from the main page file.

I also want the Jenkins setup to be solid, so the repo can run a basic CI and CD flow. Add or finish whatever Jenkins pipeline steps are needed so it can install dependencies, run checks, build the app, and be ready for deployment. If anything about the current setup is unclear, look up the current docs online and follow the usual best practice for a Next.js project.