1.1) GitHub Installation hinzugefügt

1.1%29-GitHub-Installation.md

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+## 1.1) GitHub Installation
+
+Visit the official GitHub Desktop download page:
+
+``` https://desktop.github.com/download/
+```
+The website will automatically detect your operating system (Windows or macOS) and provide the appropriate download button.
+Click Download for Windows or Download for macOS to get the installer.
+
+**Disclaimer:**
+
+This tutorial is about GitHub Destkop, there is also an alternative Git Client. 
+We will focus it on GitHub Desktop, because of it's simplicity in user friendliness. 
+The Git Client is a bit more complex, with also more usable functions.
+
+But for the sake of completeness the download link:
+``` 
+https://git-scm.com/
+```
+So depending what you prefer you are free to use on of those Clients for the upcoming workflow.
+
+
+Once the download is complete, open the installer (GitHubDesktopSetup.exe) from your Downloads folder or the location where the file was saved.
+Double-click on the installer to start the installation process.
+Choose your preferred language and click Next. Review and accept the license agreement. Select the installation location (or leave the default) and click Install.
+After the installation is complete, click Finish to launch GitHub Desktop.
+
+When GitHub Desktop opens, you will be prompted to sign in to your GitHub account. Click Sign in and enter your GitHub credentials (username and password).
+If you don’t have an account, you can create one by visiting:
+``` https://github.com
+```
+GitHub Desktop will ask for your name and email address to configure Git. This information will be used for commit history.
+
+Congrats! GitHub Desktop is now installed and ready to use.
+
+
+Next step will be to clone our GitHub/Gitea Repository by selecting File --> Clone repository
+
+https://i.imgur.com/c1MsxI3.png