added instructions on how to clone a git repository

beamtime/readme.md

@@ -202,6 +202,15 @@ Optional but handy:
 
 WIP: No idea yet what it takes to set up gitea git on a PSI computer. Can one of the Windows users update this section here, so that the others know? 🙂
 
+1. Open a Terminal (Windows Power Shell)
+2. Go to the folder where you want to store the git repository folder using the cd command, e.g. cd .\Documents\Gitea\
+3. Open the repository in your browser. You need the whole functionsMatlab repo: https://gitea.psi.ch/5505/functionsMatlab.git not only the beamtime subfolder.
+4. Click on the blue <> Code button & copy the HTTPS link
+5. Type git clone into the terminal and copy the HTTPS link after it (git clone https://gitea.psi.ch/5505/functionsMatlab.git). Press enter to run the command.
+6. If you get an authentication error (happens quite often with PSI gitea): Run the command again (press the up arrow on your keyboard and press enter again).
+7. It should now start copying the contents of the repository to the folder.
+8. Once it is done, you can go into the folder with cd .\functionsMatlab\ and do all the git things.
+
 **Option B – download zip (for non‑git days)**
 
 1. Open the repository in your browser. You need the whole functionsMatlab repo: https://gitea.psi.ch/5505/functionsMatlab.git not only the beamtime subfolder.