gatsby-node.js

const path = require("path");

exports.onCreateWebpackConfig = ({
  stage,
  rules,
  loaders,
  plugins,
  actions,
}) => {
  if (stage === "build-html") {
    actions.setWebpackConfig({
      module: {
        rules: [
          {
            test: /canvas/,
            use: loaders.null(),
          },
        ],
      },
    });
  }

  if (stage === "develop-html") {
    actions.setWebpackConfig({
      module: {
        rules: [
          {
            test: /canvas/,
            use: loaders.null(),
          },
        ],
      },
    })
  }
};

exports.createPages = async ({ graphql, actions }) => {
  const { createPage } = actions;

  const pages = await graphql(`
    {
      allPrismicPost {
        nodes {
          id
          uid
          lang
          type
          url
        }
      }
    }
  `);

  pages.data.allPrismicPost.nodes.forEach((page) => {
    createPage({
      path: page.url,
      component: path.resolve(__dirname, "src/templates/post.js"),
      context: { ...page },
    });
  });
};