Update Nextflow Tower docs

Author: AntoniaSchuster

docs/images/tower_run.png

@@ -1,6 +1,6 @@
 # Nextflow tower
 
-To be able to follow the Nextflow workflow rusn via tower, you can add Tower access credentials in your Nextflow configuration file (`~/.nextflow/config`) using the following snippet:
+To be able to follow the Nextflow workflow runs via tower, you can add Tower access credentials in your Nextflow configuration file (`~/.nextflow/config`) using the following snippet:
 
 ```console
 tower {
@@ -10,13 +10,22 @@ tower {
   enabled = true
 }
 ```
+Your access token can be created on [this page](http://cfgateway1.zdv.uni-tuebingen.de/tokens). 
+
+The workspace ID can be found on the organisation's Workspaces overview page. [Here](http://cfgateway1.zdv.uni-tuebingen.de/orgs/QBiC/workspaces) you can find QBiC's workspaces:
+
+![workspaces](../../images/tower_workspaces.png)
 
 To submit a pipeline to a different Workspace using the Nextflow command line tool, you can provide the workspace ID as an environment variable. For example
 
 ```console
 export TOWER_WORKSPACE_ID=000000000000000
 ```
+If you are outside of the University, access to the tower is only possible via VPN. When you started your run, you can now track its progress [here](http://cfgateway1.zdv.uni-tuebingen.de) after selecting your workspace and your run. Here is an example of what it looks like:
 
-The workspace ID can be found on the organisation's Workspaces overview page.
+![example run](../../images/tower_run.png)
+![example run](../../images/tower_run1.png)
+![example run](../../images/tower_run2.png)
+You can select your run on the left. You will see the name of the run, your command line and the progress and stats of the run.
 
 For more info on how to use tower please refere to the [Tower docs](https://help.tower.nf/).