You need VS Code, the Remote Development extension pack, and docker on your computer. Installing and configuring these tools it out of this documentation's scope.
- Start VS Code and run Remote-Containers: Clone Repository in Container Volume... from the Command Palette (F1).
- Enter
jpbourgeon/pouchdb-nextjs-router
orhttps://github.com/jpbourgeon/pouchdb-nextjs-router
in the input box that appears and press Enter.
You can find more on how to make it work here: https://code.visualstudio.com/docs/remote/containers#_quick-start-open-a-git-repository-or-github-pr-in-an-isolated-container-volume.