See it live: https://woerter.de/projects/retro-web/
Install the Polymer-CLI
First, make sure you have the Polymer CLI installed. Then run
polymer serve to serve your application locally.
Building Your Application
$ polymer build
This will create builds of your application in the
build/ directory, optimized to be served in production. You can then serve the built versions by giving
polymer serve a folder to serve from:
$ polymer serve build/default
Check polymer.json for build details and file path specifications. Good luck with that.