Reworded

docs/tutorial/index.md

@@ -20,8 +20,10 @@ You'll notice a few flags being used. Here's some more info on them:
 
 !!! info "Deep Dive"
     One thing you may come across if you already have development environments
-    set-up is that yoiu may be using ports already. By using port 9080 there's a 
-    good chance nothing will conflict. If you have port 9080 used by something 
+    set-up is that you may be using ports already. Port 80 is frequently blocked
+    by IIs in Windows. By using port 9080 there's a good chance nothing will conflict. 
+    
+    If you have port 9080 used by something 
     you can change that port number by changing the -p. E.g. to use port 9999
     ```
     docker run -d -p 9999:80 docker/getting-started