I believe Ubuntu 16.04 comes with PostgreSQL 9.5. Thats good for a start, but it is a matter of time before you have the need of a PostgreSQL 9.6 cluster. For me it was to import a PG backup from Heroku.
The procedure couldn't have been any easier and is described below. If you are interested in upgrading your old cluster to 9.6 afterwards, you may be interested in this.
Here's the list with the additional points:
Ensure that you have OpenJDK 17, Android Studio, and its associated tools and NDK (Native Development Kit) installed on your system.
Initialize a new Expo project by executing the following command in your terminal: pnpm create expo-app@latest. This command will prompt you to provide some details about your project, such as the project name and configuration options.
Before building the Android app, you need to prebuild the android directory. Run the command pnpm expo prebuild to generate the necessary files. Additionally, you should provide your app's package name during this step. For example, if your app's package name is com.example.app.
Generate a keystore file. Use an administrator shell to create the keystore. Run the following command: keytool -genkeypair -v -storetype PKCS12 -keystore my-upload-key.keystore -alias my-key-alias -keyalg RSA -keysize 2048 -validity 10000 and enter your password (store it safely somewhere) and details.