This is a go / baduk server.
First, start the backend server.
make run
Your terminal window or tab is blocked now, so open a new one.
You may have to run npm i once, in src/main/client.
From the project root, you can now start the dev server:
make dev
The app is running at http://localhost:3006.
Try editing a file in src/main/client/src.
The change should immediately be visible in the browser.