What you can run
If it runs in a container, it runs here.
Node, Python, Go, PHP, Ruby, Rust and static sites build without a Dockerfile. Anything else, bring your own.
Portfolios and personal sites
Your own site, a project showcase, a CV page. Built with Next, Astro, Hugo, plain HTML or whatever you reached for. It gets a real address you can put in a bio or on an application.
Student projects
Coursework, a hackathon build, a final year project. Hand in a link your marker can open on their own machine, months after the deadline.
Docs and static sites
Documentation, guides, a landing page, or the output of any static site generator. Point it at the repo and the built site goes up.
Open source apps
Give the project you maintain a live demo, so people can try it before they clone it. Self host someone else's the same way.
APIs and backends
A REST API, a bot, a scheduled job, or the backend for something you are building. Attach a database when it needs to remember things between requests.