fix typos and Django documentation version

Author: Xronophobe

chapter_10_production_readiness.asciidoc

@@ -262,7 +262,7 @@ Environment variables also have the advantage of working for non-Django stuff to
 
 ==== Setting DEBUG=True and SECRET_KEY
 
-There's lots of ways you might do this.
+There are lots of ways you might do this.
 Here's what I propose; it may seem a little fiddly,
 but I'll provide a little justification for each choice.
 Let them be an inspiration (but not a template) for your own choices!
@@ -306,7 +306,7 @@ TIP: Better to fail hard than allow a typo in an environment variable name to
 
 ==== Setting environment variables inside the Dockerfile
 
-Now let's set that environment variable in our Dockerfile using then `ENV` directive:
+Now let's set that environment variable in our Dockerfile using the `ENV` directive:
 
 [role="sourcecode"]
 .Dockerfile (ch10l006)
@@ -402,7 +402,7 @@ image::images/search-results-400-bad-request.png["Duckduckgo search results with
 `ALLOWED_HOSTS` is a security setting
 designed to reject requests that are likely to be forged, broken or malicious
 because they don't appear to be asking for your site
-(HTTP request contain the address they were intended for in a header called "Host").
+(HTTP requests contain the address they were intended for in a header called "Host").
 
 By default, when DEBUG=True, `ALLOWED_HOSTS` effectively allows _localhost_,
 our own machine, so that's why it was working OK until now.
@@ -564,7 +564,7 @@ but it's more of shock to see that they are no longer appearing in the terminal
 If you're like me you might find yourself wondering if we really _did_ see them earlier
 and starting to doubt your own sanity.
 But the explanation is that Django's
-https://docs.djangoproject.com/en/5.0/ref/logging/#default-logging-configuration[default logging configuration]
+https://docs.djangoproject.com/en/4.2/ref/logging/#default-logging-configuration[default logging configuration]
 changes when DEBUG is turned off:
 
 This means we need to interact with the standard library's `logging` module,
@@ -577,7 +577,7 @@ but sometimes you just wanna say "just print stuff to stdout pls",
 and you wish that configuring the simplest thing was a little easier].
 
 Here's pretty much the simplest possible logging config
-which just prints everything to the console (ie standard out).
+which just prints everything to the console (i.e. standard out).
 
 
 [role="sourcecode"]