add a comment on clarity

Author: Xronophobe

chapter_09_docker.asciidoc

@@ -1330,7 +1330,9 @@ CMD python manage.py runserver
 <1> We run `migrate` using the `--noinput` argument to suppress any little "are you sure" prompts.
 
 
-If we try our FTs again, they all pass!
+If we build the image and try our FTs again, they all pass!
+// CSANAD:  maybe for someone who is new to Docker, it isn't immediately obvious
+//          when to rebuild images.
 
 
 [role="small-code"]
@@ -1451,6 +1453,7 @@ https://en.wikipedia.org/wiki/Digestive_biscuit[chocolate biscuit].
 *******************************************************************************
 
 Tests and small steps some of the uncertainty out of deployment::
+// CSANAD:  feels like a word is missing from here: "and small steps ... some of the uncertainty"
     For developers, ops and infra work is always "fun",
     by which I mean a process full of uncertainty and surprises.
     My aim during this chapter was to show that a step-by-step approach