docs: update docs with more information on how to start the project

README.md

@@ -4,9 +4,28 @@
 The project is still in development, we got an open beta for MacOS though.
 You can join the beta by following the instructions [here](https://testflight.apple.com/join/mB7ZA6s5).
 
-## Development
+## Getting started
 
-### Debug starting issues
+To start the project you first have to install the dependencies:
+
+```bash
+npm install
+npx pod-install ios
+npx pod-install macos
+```
+
+After that you can start the development server.
+This will launch the Metro bundler which creates the JavaScript bundle for the app.
+
+```bash
+npm start
+```
+
+Once your Metro bundler is running, you can start the app by opening the Xcode project (`Chronos.xcodeproj`) in the `macos` directory and starting the app from within Xcode.
+The Xcode project contains two schemes: `Chronos-macOS` for development and `Chronos-macOS-prod` for the production build.
+
+
+## Debug starting issues
 
 Sometimes the dev environment will not start after updating packages or other external dependencies.
 The reason for that is that multiple caches have to be cleared and some of those don't get cleared automatically.