Update about.md

docs.it4i/lumi/about.md

@@ -12,7 +12,24 @@ Denmark, Estonia, Iceland, Norway, Poland, Sweden, and Switzerland.
 
 LUMI is one of the world’s best-known scientific instruments for the lifespan of 2021–2027.
 
-For more information about how to access the LUMI supercomputer, see the [official documentation][2].
+## LUMI Software
+
+For the list of software modules installed on LUMI,
+as well as direct links to documentation for some of the most used modules,
+see the [LUMI Software][a] subsection.
+
+## LUMI support
+
+LUMI offers general support, Czech national support, events, and training.
+For more information, see the [LUMI Support][b] subsection.
+
+## Technical Reference
+
+For more information about how to access the LUMI supercomputer,
+see the [official documentation][2].
 
 [1]: https://lumi-supercomputer.eu/
 [2]: https://docs.lumi-supercomputer.eu/
+
+[a]: software.md
+[b]: support.md