Add speaker notes as reminder for important messages

Co-authored-by: Tobias Koelling <tobias.koelling@mpimet.mpg.de>

lectures/git/slides.qmd

@@ -98,6 +98,9 @@ On Levante: `module load git`
 * Allow incremental development without impacting the other branches
 :::
 
+::: {.notes}
+Make sure to introduce feature and bugfix
+:::
 
 ## Create a branch {.leftalign}
 
@@ -125,6 +128,11 @@ git diff develop..main
 ```
 :::
 
+::: {.notes}
+* Git branches are just pointers to a hash!
+* Sometimes it is nice to visualize a branch as a sequence of commits (e.g. "feature branch"), but technically it is just a label for a commit
+:::
+
 ## Merge a branch
 
 Merge the commits of `develop` into `main`
@@ -323,6 +331,9 @@ Example from [kernel.org](https://git.kernel.org/pub/scm/linux/kernel/git/torval
 
 ![](static/mr.png)
 
+::: {.notes}
+GitLab can act as a remote (like Github or even a local copy could also).
+:::
 
 ## Hands-on session {background-color=var(--dark-bg-color) .leftalign}