Restore Heroku prebuild (#79)

We need the auth in Heroku or the builds will fail. If this was supposed to be removed, then we need a buildpack or other solution.

Author: redbugz

packages/react-scripts/scripts/utils/frontierInit.js

@@ -139,6 +139,15 @@ function configureEF(appPath, ownPath, appName) {
  const templatePath = path.join(ownPath, 'template-ef');
  fs.copySync(templatePath, appPath, { overwrite: true });
 
+ alterPackageJsonFile(appPath, appPackage => {
+ const packageJson = { ...appPackage };
+ const additionalScripts = {
+ 'heroku-prebuild': './heroku-prebuild.sh',
+ };
+ packageJson.scripts = sortScripts({ ...packageJson.scripts, ...additionalScripts });
+ return packageJson;
+ });
+ 
  depsToInstall.push(...['express@4.16.4']);
  replaceStringInFile(appPath, './blueprint.yml', /\{\{APP_NAME\}\}/g, appName)
 }