Update MAC_LINUX_DOCKER.md

MAC_LINUX_DOCKER.md

@@ -1,7 +1,13 @@
 # Learning Jenkins, 03-06: Choice Parameters
 Create a freestyle job with one build step.
 
-# MacOS, Linux, and Docker
+Add a choice parameter with three or more choices.
+
+```
+
+[Follow this link for more details on Windows](WINDOWS.md)
+
+## MacOS, Linux, and Docker
 If you are running Jenkins on MacOS, Linux, or Docker:
 
 1. Select the `Execute shell` build step.
@@ -11,5 +17,4 @@ If you are running Jenkins on MacOS, Linux, or Docker:
 echo "ENVIRONMENT = $ENVIRONMENT"
 ```
 
-# Troubleshooting Errors
-
+[Follow this link for more details on MacOS, Linux, and Docker](MAC_LINUX_DOCKER.md)