It can't be built at all.

[Gerrie-Cui]

After reading the README, I don't know what to do.

[OrangeX4]

I am sorry that my description is not clear.

You are supposed to download NodeJS, install it in your computer.

Then run the command npm install yarn -g, and run npm install in terminal in the folder you have cloned.

Finally, you can run the command yarn start for dev server or yarn build for static files.