gatsby-config.js

module.exports = {

    plugins: [
        `gatsby-plugin-react-helmet`,
        `gatsby-transformer-sharp`,
        `gatsby-plugin-sharp`,
        {
            resolve: `gatsby-plugin-manifest`,
            options: {
                name: `gatsby-starter-default`,
                short_name: `starter`,
                start_url: `/`,
                background_color: `#663399`,
                theme_color: `#663399`,
                display: `minimal-ui`,

            },
        },
        `gatsby-plugin-offline`,
    ],
}