gatsby-config.js

/**
 * Configure your Gatsby site with this file.
 *
 * See: https://www.gatsbyjs.com/docs/gatsby-config/
 */

 module.exports = {
  /* Your site config here */
  plugins: [
    `gatsby-plugin-image`,
    `gatsby-plugin-sharp`,
    `gatsby-transformer-sharp`,
    `gatsby-plugin-styled-components`,
    `gatsby-remark-images`,

    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `assets`,
        path: `${__dirname}/src/assets`,
      },
    },
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `posts`,
        path: `${__dirname}/src/posts`,
      },
    },
    {
      resolve: `gatsby-plugin-mdx`,
      options: {
        gatsbyRemarkPlugins: [
          {
            resolve: 'gatsby-remark-images',
            options: {
              maxWidth: 590,
            },
          },
        ],
      },
    },
  ],
}