Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -16,24 +16,23 @@ If you want to run the web based User Interface locally then you need to follow
 #### Prerequisites
 Install [Node.js](https://nodejs.org/en/) LTS version preferrably using [NVM](https://github.com/nvm-sh/nvm#installing-and-updating)
 
+Install [Yarn](https://classic.yarnpkg.com/en/) v1 globally: `npm i -g yarn` (this is needed because the project uses [Yarn Workspaces](https://classic.yarnpkg.com/en/docs/workspaces/))
+
 #### Building and running the Web UI
-1. Go into the ui/ directory by `cd ui/`
-2. Install Node dependencies with `npm install`
-3. Start local development server with `npm start`
+1. Run `yarn` from the root directory of the Monorepo
+2. Go into the ui/ directory by `cd ui/`
+3. Start local development server with `yarn start`
 
 ### Native app + driver
 #### Prerequisites
 
 1. Download [Xcode](https://apps.apple.com/us/app/xcode/id497799835?mt=12)
 2. Install [CocoaPods](https://cocoapods.org/) by `sudo gem install cocoapods`
-3. Install [Carthage](https://github.com/Carthage/Carthage#installing-carthage) by `brew update && brew install carthage`
 
 #### Building and running the App
 
-1. Go into the native/app directory from root of the repo by: `cd native/app/`
+1. Go into the native/app directory from root of the repo by: `cd native/`
 2. Install Cocoapod dependencies: `pod install`
-3. Install Carthage dependencies: `carthage update`
-4. Go back to the native/ directory: `cd ../`
-5. Open the Xcode workspace: `open eqMac.xcworkspace`
-6. Launch eqMac in debug mode by running the **App - Debug** Scheme:
+3. Open the Xcode workspace: `open eqMac.xcworkspace`
+4. Launch eqMac in debug mode by running the **App - Debug** Scheme:
 <img width="512" src="https://user-images.githubusercontent.com/8472525/83069640-279c1100-a062-11ea-85a7-45aa5253771b.png"/>