add build locally

Author: flexbox

challenges/release/03.md

@@ -12,7 +12,7 @@
 
 - [ ] Update your `eas.json` file to [create and install an EAS Build](https://docs.expo.dev/development/create-development-builds/#create-and-install-eas-build).
 
-### Android
+### Generate a build for Android
 
 - [ ] build a `development` binary on the expo platform for `android`.
 
@@ -30,7 +30,7 @@ eas build --profile development --platform android
 
 - [ ] Download the build artifact directly on your device from [expo.dev](https://expo.dev) website.
 
-### iOS
+### Generate a build for iOS
 
 - [ ] build a `development` binary on the expo platform for `iOS`
 
@@ -47,3 +47,15 @@ You can check this video for beta testing your React Native application with Exp
 ## 👽 Bonus
 
 - [ ] add a strategy to simplifying [React Native App Updates with Expo EAS and In-App Updates](https://imighty.hashnode.dev/simplifying-react-native-app-updates-with-expo-eas-and-in-app-updates).
+
+### Generate a build locally
+
+If you are running out of your free build minutes, you can generate a build locally.
+
+```console
+eas build --profile production --platform ios --local
+eas build --profile production --platform android --local
+```
+
+...and then download Transporter on your the mac App Store to upload your app on TestFlight.
+For android, upload the `.aab` file on the Google Play Console.