Add tip to documentation for docserver

README.md

@@ -36,4 +36,7 @@ To see a current list of commands, run `make help`.
 
 `make docserver` will start a `yard` server using the RDoc comments from the codebase. RDoc in this application is a work-in-progress and should improve over time. As of this writing, the index page generated contains broken links to our markdown documentation, but they "files" navigation displays them properly.
 
+> [!TIP]  
+> Prior to running `make docserver` the first time, you must install the bundled gems for this application using either `bundle install` or `make install` (they both do the same thing!).
+
 [Class Diagram](docs/reference/classes.md)