NixOS: add holy trinity Image

spotlight_courses/HS24_NixOS/main.typ

 #import "@preview/touying:0.5.3": *
-#import "/typst_template/thealternative.typ": *
+#import "../../typst_template/thealternative.typ": *
 #import "@preview/diagraph:0.3.0": *
 
 #show: thealt-theme.with(
@@ -48,9 +48,31 @@
 - configuring *`NixOS`*
 - *toolbox* of commands / websites
 - some *interesting projects* for NixOS
-
+== Nix, Nixpkgs, and NixOS
+#align(center)[
+  #image("img/nix-holy-trinity.png", height: 1fr)
+]
 == What sets NixOS apart
-
+    - Declarative configuration
+      - Easier to configure your system(s)
+      - Easier to change, manage and maintain the configuration
+      - Easier to back up and share with people
+    - Easy to deploy machines and their configuration
+    - Out of the box Rollbacks.
+    - Configuration options for many programs & services
+    - Free of side effects - Actually uninstalls packages and their dependencies
+    - Easy to set up VMs
+    - People can test each other's configurations using `nix run` and `nix shell` by just having access to the source
+== What sets Nix apart
+- Immutable & reproducible results
+- Easy to cross and static compile
+- Source-based (you can alter packages without forking anything)
+- Single package manager to rule them all! (C, Python, Docker, NodeJS, etc)
+- Great for development, easily switches between dev envs with direnv
+- Easy to try out packages without installing using `nix shell` or `nix run`
+- Easy to set up a binary cache
+- Easy to set up remote building
+  - Distribute your builds accross an unlimited number of machines, without any hassle
 
 = A Nix crash course
 
@@ -729,3 +751,7 @@ content = {
 
   ]
 )
+
+= Sources
+
+- https://cohost.org/leftpaddotpy/post/798893-rechosting-a-banger