You can implement your own build script which copy’s the .properties file.
My build script for the following.
- npm install
- ionic platform add ios
- ionic platform add android
- copy the property file to the platform/android folder
- ionic build ios --prod --release
- ionic build android --prod --release
Because I’m using GitlabCI and TeamCity I just have to push to my master branch and the build server do the rest for me.