Problem with Request URL in production in React

I am working on the React App project, In env file – I have declared

REACT_APP_URL = 'http://localhost:8080/'

and using axios to make HTTP request

and here is my code

export const ADMIN_URL = process.env.REACT_APP_URL;
export const api = axios.create({
  baseURL: ADMIN_URL,
  headers: {
    'Content-Type': 'application/json',
  },
});

But when I deployed I could see frontend url and backend url in the request url

example : "http://localhost:3000/login'http://localhost:8080/'/logged