Quiero inciar mi frontend y me salen los siguientes errores y no se como solucionarlos.
Primero voy a mostrar mi documento Fetch.js

const baseURL = process.env.REACT_APP_API_URL

export const fetchWithoutToken = ( endpoint, data, method='GET' ) => {

    const url = `${ baseURL }/${ endpoint }`;

    if ( method === 'GET' ){
        return fetch( url );
    } else {
        return fetch( url , {
            method,
            headers: {
                'Content-type': 'application/json'
            },
            body: JSON.stringify( data )
        });
    }

}

export const fetchWithToken = ( endpoint, data, method = 'GET' ) => {

    const url = `${ baseURL }/${ endpoint }`;
    const token = localStorage.getItem('token') || '';


    if ( method === 'GET' ){
        return fetch( url,{
            method,
            headers: {
                'Authorization': `Token ${ token }`
            }
        });
    } else {
        return fetch( url , {
            method,
            headers: {
                'Content-type': 'application/json',
                //'token': token
                'Authorization': `Token ${ token }`
            },
            body: JSON.stringify( data )
        });
    }

}

Ahora los errores:
GET http://localhost:8000/refresh-token/ net::ERR_CONNECTION_REFUSED
ncaught (in promise) TypeError: Failed to fetch
    at fetchWithToken (fetch.js:29:1)
    at auth.js:44:1
    at index.js:16:1
    at AppRouter.js:26:1
    at invokePassiveEffectCreate (react-dom.development.js:23487:1)
    at HTMLUnknownElement.callCallback (react-dom.development.js:3945:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:3994:1)
    at invokeGuardedCallback (react-dom.development.js:4056:1)
    at flushPassiveEffectsImpl (react-dom.development.js:23574:1)
    at unstable_runWithPriority (scheduler.development.js:468:1)
    at runWithPriority$1 (react-dom.development.js:11276:1)
    at flushPassiveEffects (react-dom.development.js:23447:1)
    at react-dom.development.js:23324:1
    at workLoop (scheduler.development.js:417:1)
    at flushWork (scheduler.development.js:390:1)
    at MessagePort.performWorkUntilDeadline (scheduler.development.js:157:1)

Saludos y gracias por su tiempo