`before_all` block of fastfile

fastfile before_all.rb

fastlane_require "dotenv"
PACKAGE_NAME = "<package name here>"
FIREBASE_APP_ID = "<firebase app id here>"
KEYSTORE_PATH = nil
FIREBASE_KEY_PATH = nil
PLAYSTORE_KEY_PATH = nil
BUNDLE_FILE_PATH = nil
UPDATED_VERSION_CODE = nil
before_all do
  Dotenv.overload ".env.secret"
  KEYSTORE_PATH = Dir.pwd + "/../certificates/<keystore_name>.jks"
  FIREBASE_KEY_PATH = Dir.pwd + "/../certificates/firebase-app-distribution-key.json"
  PLAYSTORE_KEY_PATH = Dir.pwd + "/../certificates/playstore-app-distribution-key.json"
  BUNDLE_FILE_PATH = Dir.pwd + "/../app/outputs/bundle/release/app-release.aab"
end