title: How do I deploy NodeJS server that's for a React Native App to Heroku?
body: <p>I have an app using React Native as its frontend, and NodeJS as backend, and it also has a cloud MySQL instance. I want to deploy the app to the public and show it to someone as demo using Heroku or maybe other hosting services. <br>
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  I want to publish my React Native App with Expo, but am not sure how/ where to host my nodeJS server so that the mobile app can access it.</p>