Después de descargarlo abri la terminal y ejecutar:
$ npm install
en el archivo .env conectalo a base datos mysql
PORT = YOUR PORT
HOST =
DATABASE = books
USER =
PASS =
DB_LIMIT= LIMIT USER
const corsOptions = {
origin: ['YOUR HOST FRONTEND'],
methods: ['GET', 'POST', 'PUT', 'DELETE'],
allowedHeaders: ['Content-Type', 'Authorization'],
credentials: true,
};
export const URI = "YOUR HOST BACKEND"