rando signing config setup

build.gradle

android {
    ...

    signingConfigs {
        release {
            storeFile file("../keystore/production.jks")
            keyAlias ...
            keyPassword ...
            storePassword ...
        }
        debug {
            storeFile file('../keystore/debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
    }
    buildTypes {
        debug {
            ...
            signingConfig signingConfigs.debug
        }
        release {
            ...
            signingConfig signingConfigs.release
        }
    }
}