Update README.md

README.md

 # TheCodelabs Brew
 
-Cask Repository for brew package manager
+Cask Repository for brew package manager for macOS
+
+## Usage
+
+To tap this repository into the local homebrew use this command `brew tap thecodelabs/brew https://thecodelabs.de/tobias/thecodelabsbrew`
+
+## Install Cask Packages
+
+To install packages from this repository use the normal command such as `brew cask install playwall`
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