Have a look at http://docs.apportable.com/publishing.html
Long story short:
- Create release keys in your
.android
-folder usingkeytool -genkey -v -keystore release.keystore -alias mykey -keyalg RSA -keysize 2048 -validity 10000
(or similar) - Build the release-app using the keys you just created:
BUILD=release ANDROID_KEYSTORE=release.keystore ANDROID_KEYSTORE_PASS=mypassword apportable build
Don't forget to save your keys in a safe place as your app-updates need to be signed by the same key.