fix double-quote issue in env.j2

add notice on changing env taking effect

Author: Xronophobe

chapter_11_ansible.asciidoc

@@ -707,14 +707,10 @@ Here's what our template for the env file will looks like:
 [source,python]
 ----
 DJANGO_DEBUG_FALSE=1
-DJANGO_SECRET_KEY="{{ secret_key }}"
-DJANGO_ALLOWED_HOSTS="{{ host }}"
+DJANGO_SECRET_KEY={{ secret_key }}
+DJANGO_ALLOWED_HOSTS={{ host }}
 ----
 ====
-// CSANAD: we named the allowed hosts' env variable in plural form, as it's
-//         named in settings.py but we pass one value, so it feels weird.
-//
-// I'd suggest DJANGO_ALLOWED_HOSTS="{{ hostname }}"
 
 And here's how we use it in the provisioning script:
 
@@ -751,6 +747,12 @@ And here's how we use it in the provisioning script:
 
 <2> `force: false` means we will only write the file once.
     So after the first time we generate our secret key, it won't change.
+// CSANAD: but it also means any change we make in the .env would not take
+//         effect until we manually delete the old superlists.env file from
+// the server.
+// We should mention this, because if the reader makes a mistake
+// in the env file, but then they find it, they won't be able to fix it unless
+// they realize this is why the values don't change. Guess how I learned that :)
 
 <3> The `vars` section defines the variables we'll inject into our template.