I already have a complete Expo React Native code base; what I’m missing is a lightweight micro-service that can take that source, compile it, and hand back a signed, install-ready APK targeted specifically at phones. Your job is to set up that build step so I can trigger it whenever there’s a new commit and instantly download the latest phone-optimised APK. My current environment might or might not be sufficient, so I’ll rely on your recommendation—whether that means a Docker-based image, a simple Fastlane script, or another proven approach. As long as the result is consistent, reproducible and doesn’t require me to click through Android Studio each time, I’m happy. Deliverables • Fully functional build micro-service (script, container or CI pipeline) that pulls my React Native project and outputs a signed APK optimised for phones • One clean sample run demonstrating the APK creation, plus the generated APK file itself • Step-by-step instructions so I can deploy or hand the service off to another developer later If this sounds straightforward to you and you’ve built React Native pipelines before, let’s get it done.