gatsby-theme-wordpress-mdx/src/Shortcodes/ImgShortcode.js

<p align="center"> <img width='200px' alt="Gatsby Theme" src="https://raw.githubusercontent.com/artezan/gatsby-theme-wordpress-mdx/master/%40artezan/gatsby-theme-wordpress-mdx/dn.png" />

/** @jsx jsx */
import { jsx } from 'theme-ui'
import Img from 'gatsby-image'

export const ImgGatsby = props => <Img {...props} />