Open your project in Plasmic Studio, click on the ellipsis menu by the name of the project on the top-left corner, and select “Configure project”:
Enter the following app host URL (taking care to specify the http/https dropdown correctly), and press Confirm.
Your project should now reload with the new app host.
Now, any code components you register from your codebase will show up in this Plasmic project. Follow the component registration guide here!