add page for unsupported software

docs/software/unsupported.md

@@ -0,0 +1,15 @@
+[](){ref-software-unsupported}
+# Unsupported Software
+
+There are some software packages that CSCS can't or won't provide directly for users, often for licensing reasons.
+
+## Gaussian
+
+The electronic structure modeling code [Gaussian](https://gaussian.com/) has license terms that prohibit installing and using it on CSCS systems under any circumstances.
+
+## Matlab
+
+CSCS does not have a license to provide [Matlab](https://www.mathworks.com/products/matlab.html) to users on Alps.
+
+Users or groups with valid licenses can install Matlab themselves.
+Please ensure that you install the software in a location where only members of your group who are allowed to use Matlab can access it.

mkdocs.yml

@@ -80,6 +80,7 @@ nav:
       #- 'Performance Analysis': software/devtools/perf/index.md
     - 'uenv': software/uenv.md
     - 'Container Engine': software/container-engine.md
+    - 'Unsupported Software': software/unsupported.md
   - 'Services':
     - services/index.md
     - 'FirecREST': services/firecrest.md