Show the system version on the Bootstrap screen

It's needed for the right version of node to be installed.

Didn't have time to dive into directly comparing versions, but this is better
than talking about a niche DA concept with no reference to the docs.

docassemble/ALDashboard/data/questions/compile_bootstrap.yml

@@ -82,8 +82,8 @@ subquestion: |
 
   For more information, see [our tutorial on making a custom bootstrap theme](https://suffolklitlab.org/legal-tech-class/docs/practical-guide-docassemble/theming-docassemble#creating-a-custom-theme-from-source-instead-of-with-a-theme-generator).
 
-  You will need to have a recent version of Docassemble's "system" OS to use this tool. (at least 1.4.43). This may require
-  an upgrade to the [Docker container](https://suffolklitlab.org/legal-tech-class/docs/practical-guide-docassemble/maintaining-docassemble#updates-to-the-docassemble-container).
+  If your Docassemble "system" version is less than 1.4.43, you will need to upgrade (yours is ${ get_config("system version") }).
+  This requires an upgrade to the [Docker container](https://suffolklitlab.org/legal-tech-class/docs/practical-guide-docassemble/maintaining-docassemble#updates-to-the-docassemble-container).
 continue button field: start_screen
 ---
 id: file-upload