如何修复 Angular 应用程序中的 heroku build.sh permissin denied 错误

问：

我正在部署我的 Angular 应用程序并收到此错误：

sh: 1: ./heroku.build.sh: Permission denied
npm ERR! code ELIFECYCLE
npm ERR! errno 126
npm ERR! [email protected] heroku-postbuild: `./heroku.build.sh

package.json

    "heroku-postbuild": "./heroku.build.sh"

heroku.build.sh

#!/usr/bin/env bash

usage() {
  echo "OVERVIEW: Build apps according to BUILD_ENV value. Meant to be used for Heroku deployment"
  exit
}

if [ "$1" = '-h' ] || [ "$1" = '--help' ]; then
  usage
fi

(
  if [ "$BUILD_ENV" ]; then
    ng build $BUILD_ENV --configuration $ENVIRONMENT && ng run $BUILD_ENV:server:$ENVIRONMENT
  else
    echo "Error: no build config for BUILD_ENV value '$BUILD_ENV'"
    exit 1
  fi
)

如何修复此错误？

我删除并删除了，但它仍然不起作用。node_modulesheroku.build.sh