Edited quickstart

src/docs/getting-started/quickstart.mdx

@@ -5,7 +5,7 @@ title: "Quick-start Guide"
 
 ## Prerequisites
 
-The programmer is assumed to be familiar with
+We assume that you are somewhat familiar with:
 - git and gitlab (https://eicweb.phy.anl.gov)
 - working in the terminal over ssh
 - cmake, C++, python, and shell scripting
@@ -15,8 +15,11 @@ This tutorial requires that [singularity](singularity) is installed
 on the local system. 
 Singularity can be [downloaded here](https://sylabs.io/guides/3.7/user-guide/quick_start.html) -- 3.7 being the 
 most recent version as of January 2021.
+
+*For an optimal experience, we strongly recommend you to use singularity 3 or later for this tutorial. 
+Use (very) old versions of singularity (e.g. 2.6.x) at your own risk!*
  
-## The EIC Software Container
+## The EIC Software Container (jug_xl)
 
 ### Step 1: Create a local directory that you want to work in, e.g., `~/eic`
 ```bash
@@ -24,9 +27,9 @@ mkdir ~/eic
 cd ~/eic
 ```
 
-### Step 2: Deploy the containerized environment and launc a shell
+### Step 2: Deploy the containerized environment and launch a shell
 
-Execute the following line in your tgerminal to setup your environment in your sandbox
+Execute the following line in your terminal to setup your environment in your sandbox
 directory. This will install the latest stable container and place a script called
 `eic-shell` in the top-level directory. This script will load the environment for you.
 
@@ -61,12 +64,16 @@ Before moving on to part 1, let's generate the geometry in a root file:
 
 ```bash
 cd athena
+source /opt/detector/setup.sh
 dd_web_display --export athena.xml
 ```
 
 This will generate the file `detector_geometry.root`, which you should copy to your local machine.
 Then open the [web viewer](https://eic.phy.anl.gov/geoviewer/), click on the `...` and open the local root file.
 
+(Note, the `source /opt/detector/setup.sh` command adds the Athena detector plugins that ship
+with the jug_xl container to your environment.)
+
 Or if you want to skip this just 
 [click here to view the latest detector](https://eic.phy.anl.gov/geoviewer/index.htm?file=https://eicweb.phy.anl.gov/api/v4/projects/473/jobs/artifacts/master/raw/geo/detector_geo_full.root?job=report&item=default;1&opt=clipxyz;transp30;zoom75;ROTY290;ROTZ350;trz0;trr0;ctrl;all&).