ionic cordova build android --prod --release
This will generate a release apk in platforms\android\app\build\outputs\apk\release
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore covid-tips.keystore platforms\android\app\build\outputs\apk\release\app-release-unsigned.apk idems
Note, this assumes that you have jarsigner configured in Path (google if not) and app keystore file in root folder (request access from devs) with password knowledge
zipalign -v 4 platforms\android\app\build\outputs\apk\release\app-release-unsigned.apk releases/covid-tips.apk
Assumes zipalign in path (if not google). Recommended to rename corresponding apk to match version number (TODO - automate name from package.json or config.xml)