docs: add LOCALBUILD.md readme (#24)

LOCALBUILD.md

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+
+# ReactTube - Local Build
+
+This guide explains how to build "ReactTube" for your Apple TV.
+
+## Prerequisites
+
+- Node.js (Recommended Version: LTS)
+- Yarn or npm
+- Expo CLI
+- Xcode (for tvOS simulation and building on a real device)
+- An Apple Developer Account
+
+## Steps to Build the ReactTube tvOS App
+
+### 1. Install Dependencies
+
+Ensure you have Node.js and Yarn installed.
+
+#### Node.js
+Download and install the latest LTS version of [Node.js](https://nodejs.org/).
+
+#### Yarn (recommended)
+```bash
+npm install -g yarn
+```
+
+Alternatively, use npm:
+```bash
+npm install -g npm
+```
+
+### 2. Clone the ReactTube Repository
+
+Clone the existing ReactTube project from your version control system:
+```bash
+git clone https://github.com/Duell10111/ReactTube.git
+cd ReactTube
+```
+
+### 3. Install Project Dependencies
+
+Navigate to the project directory and install dependencies:
+```bash
+yarn install
+```
+or
+```bash
+npm install
+```
+
+### 4. Adjust `app.json` for tvOS
+
+Open the `app.json` file in your project and set the isTV settings for tvOS deployment. Here is an example:
+```json
+{
+  "expo": {
+    "name": "ReactTube",
+    "slug": "reacttube",
+    "plugins": [
+      [
+        "@react-native-tvos/config-tv",
+        {
+          "isTV": true, // <- change this to true to build for TV
+          "showVerboseWarnings": false,
+          "tvosDeploymentTarget": "13.4",
+          "removeFlipperOnAndroid": true,
+          "androidTVBanner": "./assets/images/tv/tv_banner.png",
+          "appleTVImages": {
+            "icon": "./assets/images/tv/app_store_icon.png",
+            "iconSmall": "./assets/images/tv/app_store_icon_400.png",
+            "topShelf": "./assets/images/tv/app_store_icon_topshelf.png",
+            "topShelf2x": "./assets/images/tv/app_store_icon_topshelf.png",
+            "topShelfWide": "./assets/images/tv/app_store_icon_topshelf.png",
+            "topShelfWide2x": "./assets/images/tv/app_store_icon_topshelf.png"
+          }
+        }
+      ]
+    ]
+  }
+}
+```
+
+### 5. Run prebuild
+
+```bash
+npx expo prebuild --clean
+```
+
+### 6. Build and Run on Apple TV
+
+#### Adjust the Xcode Project for Release Variant of XCode
+Open the iOS directory in Xcode:
+```bash
+open ios/ReactTube.xcworkspace
+```
+- Go to the project settings and configure your reacttube target.
+- Change the build configuration to Release in your schema.
+
+#### Build and Run
+- Select your reacttube target in Xcode.
+- Connect your Apple TV to the Mac.
+- Click on "Run".
+
+## Resources
+
+- [Expo Documentation](https://docs.expo.dev/guides/building-for-tv/#build-for-apple-tv)
+- [React Native tvOS](https://github.com/react-native-tvos/react-native-tvos)
+- [Apple Developer Documentation](https://developer.apple.com/documentation/)
+