Thilagavathi1

android {
    productFlavors {
        development {
            minSdkVersion rootProject.ext.minSdkVersion
            applicationId 'com.awesome.project.dev'
            targetSdkVersion rootProject.ext.targetSdkVersion
            resValue "string", "build_config_package", "com.myapp"
        }
        production {
            minSdkVersion rootProject.ext.minSdkVersion

Thilagavathi1

"android:dev": "react-native run-android --variant=developmentdebug",
"android:dev-release": "react-native run-android --variant=developmentrelease",
"android:prod": "react-native run-android --variant=productiondebug",
"android:prod-release": "react-native run-android --variant=productionrelease",
"ios:prod": "react-native run-ios --configuration 'Debug' --scheme 'AwesomeAppProduction'",
"ios:prod-release": "react-native run-ios --configuration 'Release' --scheme 'AwesomeAppProduction'",  
"ios:dev": "react-native run-ios --configuration 'Debug' --scheme 'AwesomeAppDevelopment'",
"ios:dev-release": "react-native run-ios --configuration 'Release' --scheme 'AwesomeAppDevelopment'",

Thilagavathi1

install the eslint package globally.
1.sudo npm install -g eslint
2.Copy the code from the link https://packagecontrol.io/installation (related to sublime text3 or sublime text2)
  *paste the code to View->show console option in the sublime editor

3.npm install --save-dev eslint-config-rallycoding
4.ADD FILE IN PROJECT DIRECTORY
.eslintrc file ==> this file has the {"extends": "rallycoding"}

5.ctr + shift+p ==> click install package