doccano/app/server/static/js/http.js

axios.defaults.xsrfCookieName = 'csrftoken';
axios.defaults.xsrfHeaderName = 'X-CSRFToken';
var base_url = window.location.href.split('/').slice(3, 5).join('/');
let HTTP = axios.create({
    baseURL: `/api/${base_url}/`
});

export default HTTP;