(프로젝트명) 📂
-> android 📂
-> gradle 📂
-> wrapper 📂
-> gradle-wrapper.properties 📄
-> 7.5를 8.5로 수정

android -> key.properties 생성

android/app/build.grale
-> android{ 위쪽에
def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

-> buildTypes -> release
buildTypes {
    release {
        signingConfig signingConfigs.create("release")
        signingConfig.storeFile = file(keystoreProperties['storeFile'])
        signingConfig.storePassword = keystoreProperties['storePassword']
        signingConfig.keyAlias = keystoreProperties['keyAlias']
        signingConfig.keyPassword = keystoreProperties['keyPassword']

        minifyEnabled false
        shrinkResources false
    }
}