Merge branch 'update-quickstart.md' into 'preview'

Update Jupyter section and screenshots on page quickstart.md

See merge request !959

doc.zih.tu-dresden.de/docs/quickstart/getting_started.md

@@ -69,25 +69,27 @@ Next, the mentioned access methods are described step by step.
 ### JupyterHub
 
 1. Access JupyterHub at
-[https://taurus.hrsk.tu-dresden.de/jupyter](https://taurus.hrsk.tu-dresden.de/jupyter)
-(not yet available for barnard).
-1. Start by clicking on the button `Start My Server` and you will see two Spawner Options,
-`Simple` and `Advanced`.
-1. The `Simple` view offers a minimal selection of parameters to choose from. The `Advanced`
-view gives more opportunities. To get started, choose the `Simple` view, follow the image below
-for choice of parameters and then click `Spawn`
+[https://jupyterhub.hpc.tu-dresden.de](https://jupyterhub.hpc.tu-dresden.de).
+1. Log in with your ZIH-login credentials.
+1. Choose a profile (system and resources):
 ![Simple form](misc/jupyterhub-spawner-options.jpg)
 {: align="center"}
-1. You will see:
+1. You will see the following - wait until resources are allocated:
 ![Spawning](misc/jupyterhub-spawning.jpg)
-1. Once it loads, you will see the possibility between opening a `Notebook`, `Console` or `Other`.
+1. Once JupyterLab is loaded, you will see all available kernels on the system you chose,
+categorized by `Notebook`, `Console` and `Other`, with which you can start right away. If you miss
+software packages that you wish to use, you can
+[build your own environment and jupyter kernel](../access/jupyterhub_custom_environments.md).
 Note that you will now be working in your home directory as opposed to a specific workspace
-(see [Data Management and Data Transfer](#data-transfer-and-data-management) section below for more details).
+(see [Data Management and Data Transfer](#data-transfer-and-data-management)
+section below for more details).
 
-!!! caution "Stopping session on JupyterHub"
-    Once you are done with your work on the ZIH HPC systems, explicitly stop the session by logging
-    out by clicking `File` &#8594 `Log Out` &#8594 `Stop My Server`.
-    Alternatively, choose `File` &#8594 `Hub Control Panel` &#8594 `Stop My Server`.
+!!! caution "Stopping your Jupyter session"
+
+    Once you are done, you have to explicitly stop the Jupyter session by clicking
+    `File` &#8594 `Hub Control Panel` &#8594 `Stop My Server`.
+    Otherwise it will run for the amount of hours you chose with the spawning profile.
+    Logging out will not stop your server.
 
 Explore the [JupyterHub](../access/jupyterhub.md) page for more information.