p 81:3000 maps the host machine's port 81 to the container's port 3000) Expose port 3000 in your Docker run config (e.g.If you're familiar with hosting web servers and/or reverse proxies, follow this: There are two options for running the web server: Web server config Epic Games's device code session expires after 10 minutes, so this project uses a web server and redirect to prevent from sending you a new link every 10 minutes. This project can occasionally ask you to login via device code authentication.