Gradle Build, build types

build.gradle

signingConfigs {
        debug {
            print(file(keystoreProperties['storeFile']))
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile file(keystoreProperties['storeFile'])
            storePassword keystoreProperties['storePassword']
        }

        release {
            print(file(keystoreProperties['storeFile']))
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile file(keystoreProperties['storeFile'])
            storePassword keystoreProperties['storePassword']
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            multiDexEnabled true
            signingConfig signingConfigs.release
            manifestPlaceholders = [crashlyticsApiKey: keystoreProperties['fabric_api_key']]
            ext.betaDistributionReleaseNotes="-- First live build"
            ext.betaDistributionGroupAliases="Group-Release"
            ext.betaDistributionNotifications=true
        }

        debug {
            applicationIdSuffix ".dev"
            versionNameSuffix "-dev"
            minifyEnabled false
            multiDexEnabled true
            signingConfig signingConfigs.debug
            manifestPlaceholders = [crashlyticsApiKey: keystoreProperties['fabric_api_key']]
            ext.betaDistributionReleaseNotes="-- First debug build"
            ext.betaDistributionGroupAliases="Group-Testers"
            ext.betaDistributionNotifications=true
        }
    }