Change URL to file node in Gatsby

gatsby-node.js

const { createRemoteFileNode } = require(`gatsby-source-filesystem`);

exports.onCreateNode = async ({
  actions,
  node,
  createNodeId,
  store,
  cache
}) => {
  const { createNode } = actions;
  if (node.internal.type === `googleSheetPodBotRow`) {
    let fileNode;

    try {
      fileNode = await createRemoteFileNode({
        url: node.episoderecordingurl,
        parentNodeId: node.id,
        store,
        cache,
        createNode,
        createNodeId
      });
    } catch (e) {
      console.log(e);
    }

    // Adds a field `localFile` to the node
    // ___NODE appendix tells Gatsby that this field will link to another node
    if (fileNode) {
      node.localFile___NODE = fileNode.id;
    }
  }
};