Update instructions for Explorer

incubating/mq-explorer/README.md

@@ -1,14 +1,19 @@
 
 Docker for Mac
 --------------
+Steps to build a Docker image containing IBM MQ Explorer:
+1. Download and extract the code from [GitHub](https://codeload.github.com/ibm-messaging/mq-container/zip/master), or run the following command: `git clone https://github.com/ibm-messaging/mq-container`
+2. Open a Terminal window in the `mq-container` directory
+3. Run `docker build -t mq-explorer -f ./incubating/mq-explorer/Dockerfile .`
 
-1. Install XQuartz.  Version 2.7.10 works, but V2.7.11 doesn't seem to.
+Steps to prepare your Mac with XQuartz:
+1. Install XQuartz.  Version 2.7.10 works, but V2.7.11 doesn't seem to (see [this thread](https://stackoverflow.com/questions/38686932/how-to-forward-docker-for-mac-to-x11))
 2. Run XQuartz
 3. Open the XQuartz "Preferences" menu, go to the "Security" tab and enable "Allow connections from network clients"
-4. Add your IP address to the list of allowed hosts: `xhost + $(ipconfig getifaddr en0)`
-5. Run MQ Explorer: `docker run -e DISPLAY=$(ipconfig getifaddr en0):0 -v /tmp/.X11-unix:/tmp/.X11-unix -u 0 -ti mq-explorer`
 
-https://stackoverflow.com/questions/38686932/how-to-forward-docker-for-mac-to-x11
+Steps to run IBM MQ Explorer:
+1. Add your IP address to the list of allowed hosts: `xhost + $(ipconfig getifaddr en0)`
+2. Run MQ Explorer: `docker run -e DISPLAY=$(ipconfig getifaddr en0):0 -v /tmp/.X11-unix:/tmp/.X11-unix -u 0 -ti mq-explorer`
+
+
 
-docker run -e DISPLAY=docker.for.mac.localhost:0 -v /tmp/.X11-unix:/tmp/.X11-unix -u 0 -ti mq-explorer
-Use DISPLAY=docker.for.mac.localhost:0 ???