fix jupyterhub

 - add table of what it's available on each cluster

doc.zih.tu-dresden.de/docs/access/jupyterhub.md

@@ -53,7 +53,7 @@ Our simple form offers you the most important settings to start quickly.
 {: align="center"}
 We have created three profiles for each Cluster, namely:
 
-| name                                         | optimized for   | specially recommended for |
+| name                                         | optimized for   | recommended for |
 |----------------------------------------------|-----------------|---------------------------|
 | Alpha - 1 core, 1,5GB 1 hour                 | x86_64 (AMD)    | python programming        |
 | Alpha - 2 Core, 3GB, 4 Hours                 | x86_64 (AMD)    | R programming             |
@@ -75,6 +75,10 @@ like as following:
 ![JupyterLab overview](misc/jupyterlab_overview_2023-12-19.png)
 {: align="center"}
 
+!!! note
+    Your interface may differ from the picture above as not all icons (launchers) are available
+    at all profiles.
+
 The main workspace is used for multiple notebooks, consoles or
 terminals. Those documents are organized with tabs and a very versatile
 split screen feature. On the left side of the screen you can open
@@ -86,6 +90,18 @@ several views:
   - details about selected notebook cell
   - list of open tabs
 
+At the following table it's possible to see what is available at each cluster.
+
+| Cluster              | Julia  | R  | RStudio | Matlab | Matlab Web | WebVNC | DCV |
+|----------------------|--------|----|---------|--------|------------|--------|-----|
+| Alpha                |   -    | OK |    OK   |   OK   |     OK     |   OK   |  OK |
+| Barnard              |   OK   | OK |    OK   |   OK   |     OK     |   OK   |  OK |
+| Romeo                |   -    | OK |    OK   |   OK   |     OK     |   OK   |  OK |
+| VIS                  |   OK   | OK |    OK   |   OK   |     OK     |   OK   |  OK |
+
+!!! note
+    All small profiles for all clusters do not include MATLAB Web neither WebVNC.
+
 ## Jupyter Notebooks in General
 
 In JupyterHub, you can create scripts in notebooks. Notebooks are programs which are split into