In Create a Custom Gatsbyjs Recipe for Installing NPM Packages you learned how to write a Gatsby Recipe to install an NPM Package. For gatsby plugins and themes, there is a config step as well.
In this lesson we will create a new step within a recipe that will install the
gatsby-plugin-postcss package and configure it within
gatsby-config.js using the
GatsbyPlugin component. NOTE: Options support for configuring plugins coming soon.