The Terminal codes required to build the production apk in the ionic capacitor project.

query.sh

## Build the ionic app -- for production

ionic build

## Add android platform 

ionic capacitor add android

## Sync the project for android

ionic capacitor sync

## To generate the Keytool

keytool -genkey -alias alias_name -keystore keystore_name.pfx -storetype PKCS12 -keyalg RSA -validity 10000 -keysize 2048

##To generate unsigned APK

cd android && 
./gradlew assembleRelease && 
cd app/build/outputs/apk/release

##Sign the apk with jarsigner

jarsigner -keystore path_to_keystore.pfx -storepass keystore_password app-release-unsigned.apk alias_name

## Get the Release Apk

sudo zipalign 4 app-release-unsigned.apk app-release.apk