keytool -genkey -v -keystore my-upload-key.keystore -alias my-key-alias -keyalg RSA -keysize 2048 -validity 10000

// android/app/build.gradle

// https://www.microcenter.com/tech_center/article/6819/how-to-open-keychain-access-in-mac-os-x
def getPassword(String currentUser, String keyChain) {
  def stdout = new ByteArrayOutputStream()
  def stderr = new ByteArrayOutputStream()
  exec {
      commandLine 'security', '-q', 'find-generic-password', '-a', currentUser, '-s', keyChain, '-w'
      standardOutput = stdout
      errorOutput = stderr
      ignoreExitValue true
  }
  //noinspection GroovyAssignabilityCheck
    stdout.toString().trim()
}

def pass = getPassword("hemersonvianna","android_keystore")

signingConfigs {
  release {
    if (project.hasProperty('MYAPP_UPLOAD_STORE_FILE')) {
      storeFile file(MYAPP_UPLOAD_STORE_FILE)
      storePassword pass
      keyAlias MYAPP_UPLOAD_KEY_ALIAS
      keyPassword pass
    }
  }
  ...
}

// download
https://github.com/google/bundletool/releases
// or
brew install bundletool

bundletool build-apks --bundle=/MyApp/my_app.aab --output=/MyApp/my_app.apks
  --ks=/MyApp/keystore.jks
  --ks-pass=file:/MyApp/keystore.pwd
  --ks-key-alias=MyKeyAlias
  --key-pass=file:/MyApp/key.pwd

//  Run react-devtools from the terminal to launch the standalone DevTools app:
npx react-devtools

// If you're not in a simulator then you also need to run the following in a command prompt:
adb reverse tcp:8097 tcp:8097