fix: Use same config for branch deploys as for deploy previews (#1893)

* fix: Use same config for branch deploys as for deploy previews

* chore: remove unnecessary duplicate build-deploy-preview.sh file

* fix: Attempt to workaround Netlify cache issues for Lerna repos

* chore: Remove useless debug file

* fix: try to make Gatsby less slow

platform/ui/gatsby-node.js

@@ -4,12 +4,11 @@ const PnpWebpackPlugin = require(`pnp-webpack-plugin`); // Required until Webpac
 
 exports.onCreateWebpackConfig = args => {
   args.actions.setWebpackConfig({
+    node: { fs: 'empty' },
     resolve: {
       plugins: [PnpWebpackPlugin],
       // Note the '..' in the path because docz gatsby project lives in the '.docz' directory
       modules: [
-        // monorepo root
-        path.resolve(__dirname, '../../../node_modules'),
         // platform/ui
         path.resolve(__dirname, '../node_modules'),
         // .docz