issue #21 Challenge questions

Author: HeidiSeibold

04-Dockerhub.Rmd

@@ -89,6 +89,16 @@ docker push yourhubusername/hadleyverse_gapminder
 Your image is now available for everyone to use.
 
 
+## Challenge Questions 
+
+- Download your partner's image. How did that compare speed-wise to downloading 
+the hadleyverse image the first time? 
+- Browse Docker Hub for interesting images. What could be useful to you?
+- Discuss the pros and cons of using Docker images from someone you don't
+know with your neighbour.
+
+
+
 Next: Go to [Lesson 05 Dockerfiles](05-dockerfiles.html) or back to the 
 [main page](http://ropenscilabs.github.io/r-docker-tutorial/).
 

04-Dockerhub.html

@@ -95,6 +95,14 @@ <h2>Getting an image to Docker Hub</h2>
 <pre><code>docker push yourhubusername/hadleyverse_gapminder</code></pre></li>
 </ol>
 <p>Your image is now available for everyone to use.</p>
+</div>
+<div id="challenge-questions" class="section level2">
+<h2>Challenge Questions</h2>
+<ul>
+<li>Download your partner’s image. How did that compare speed-wise to downloading the hadleyverse image the first time?</li>
+<li>Browse Docker Hub for interesting images. What could be useful to you?</li>
+<li>Discuss the pros and cons of using Docker images from someone you don’t know with your neighbour.</li>
+</ul>
 <p>Next: Go to <a href="05-dockerfiles.html">Lesson 05 Dockerfiles</a> or back to the <a href="http://ropenscilabs.github.io/r-docker-tutorial/">main page</a>.</p>
 </div>