• Install exact Development snapshot version from Swift.org or via swiftenv.
• Checkout TodoApp example project.
• Run swift build inside app.
• Run ./.build/debug/Swifton-TodoApp.
• Open http://0.0.0.0:8080/todos in your browser.

You may get this error after updating TodoApp:

error: The dependency graph could not be satisfied because an update to...

Simply run:

swift build --clean dist
swift build

Just try it out by deploying to Swifton.me (not affiliated with Swifton).