docs: improve BUILD.md and DEVELOPMENT.md

Author: pwltr

BUILD.md

@@ -1,5 +1,14 @@
 # Building Bitkit from source
 
+These instructions are for building Bitkit from source to get a production version of the app. If you are looking for the latest release, you can download it from the [App Store](https://testflight.apple.com/join/lGXhnwcC) or [Google Play](https://play.google.com/store/apps/details?id=to.synonym.bitkit.wallet) or get the latest APK from the [releases page](https://github.com/synonymdev/bitkit/releases).
+
+## Requirements
+
+Make sure you have [setup your environment for React Native](https://reactnative.dev/docs/environment-setup).
+
+> [!NOTE]  
+> Not all of the steps outlined in the above link may be required for building the app. You can skip the ones not relevant to you.
+
 ## Setup
 
 1. Clone the repository
@@ -10,33 +19,26 @@ git clone [email protected]:synonymdev/bitkit.git && cd bitkit
 
 2. Switch Node version
 
-Switch to the Node.js version defined in `.nvmrc`. If `nvm` (or similar) is installed on your system you can run `nvm use`.
+Switch to the Node.js version defined in `.node-version`. You can visit [.node-version File Usage](https://github.com/shadowspawn/node-version-usage) and use one of these methods to change the node version you need.
 
 3. Install dependencies
 
 ```shell
 yarn install
 ```
 
+4. Set environment variables
+
+```shell
+cp .env.production.template .env.production
+```
+
 ## Build
 
 ### iOS
 
-For iOS: Open the `ios` folder in Xcode to build the project.
+Follow instructions from the [React Native docs](https://reactnative.dev/docs/publishing-to-app-store) for iOS.
 
 ### Android
 
-For Android: `yarn bundle`.
-
-Moreover, to build the Android APK, it is necessary to configure a signing store to sign
-the apk, as explained by [React Docs](https://reactnative.dev/docs/signed-apk-android).
-
-It is recommend to use the already presented `debug.store` in `android/app`.
-Add the following lines to `~/.gradle/gradle.properties`:
-
-```shell
-BITKIT_UPLOAD_STORE_FILE=debug.keystore
-BITKIT_UPLOAD_STORE_PASSWORD=android
-BITKIT_UPLOAD_KEY_ALIAS=androiddebugkey
-BITKIT_UPLOAD_KEY_PASSWORD=android
-```
+Follow instructions from the [React Native docs](https://reactnative.dev/docs/signed-apk-android) for Android. After that you can find the `.aab` under `android/app/build/outputs/bundle/release/app-release.aab` which can be installed on your device.

DEVELOPMENT.md

@@ -1,5 +1,9 @@
 # Development
 
+This document describes how to setup your environment to build Bitkit for development and to run automated tests. If you just want to build it from source for normal usage, see [BUILD.md](./BUILD.md).
+
+## Requirements
+
 Make sure you have [setup your environment for React Native](https://reactnative.dev/docs/environment-setup).
 
 ## Installation