contiago-toolbar/app/containers/ArticlePage/components/Attachments/Media/Img.js

One of the options for outputting content from contiago xml-server

import styled from 'styled-components';

export default styled.div`
  background-image: url(${(props) => props.src});
  background-size: 100% auto;
  background-position: 50% 50%;
  width: ${(props) => props.size};
  height: ${(props) => props.size};
`;