gatsby-ghost-snippet.js

// index
const posts = data.allGhostPost.edges
const host = location.origin // `bkkjs-example.web.app`
const match = new RegExp(`http://localhost:2368/content/images`, `g`)
const modPosts = posts.map(({ node }) => {
    const modFeatureImg = node.feature_image ? node.feature_image.replace(match, `${host}/images`) : node.feature_image
    const modAuthorImg = node.primary_author.profile_image ? node.primary_author.profile_image.replace(match, `${host}/images`) : node.primary_author.profile_image
    // const modHTML = node.html.replace(match, `${host}/images`)
    return {
        node: {
            ...node,
            feature_image: modFeatureImg,
            primary_author: {
                ...node.primary_author,
                profile_image: modAuthorImg,
            },
        },
    }
})
    
    
 // post
const post = data.ghostPost
const host = location.origin // `bkkjs-example.web.app`
const match = new RegExp(`http://localhost:2368/content/images`, `g`)
const featureImg = post.feature_image ? post.feature_image.replace(match, `${host}/images`) : post.feature_image
const html = post.html.replace(match, `${host}/images`)