Answers for "Keystore file android\app\my-upload-key.keystore not found for signing config 'release'"

Keystore file android\app\my-upload-key.keystore not found for signing config 'release'

In terminal/command prompt type this command:

keytool -genkey -v -keystore your_keystore_fileName.keystore -alias your_alias -keyalg RSA -keysize 2048 -validity 10000

Enter the details prompted.
make sure the generated file is under android/app. If not, cut and paste the 
file under android/app.

under android/app -> build.gradle:

signingConfigs {
    release {
        storeFile file('your_keystore_fileName.keystore')
        storePassword 'password_that_you_set'
        keyAlias 'Partnerkey0'
        keyPassword 'password_that_you_set'
    }
}