Update src/main/resources/explanations/challenge3.adoc
=== Docker ENV based password
-Did you know that you can also use the ENV in Docker containers to set the password? What a great idea to share it with everyone!
+Did you know that you can use the ENV as well in Docker containers to set the password? What a great idea to share it with everyone!
You can easily spot the secret by looking at how the layers were constructed or detecting it with a tool like https://github.com/goodwithtech/dockle[*Dockle*].
