ENH: Add Docker image deployment step to CircleCI config

Author: thewtex

circle.yml

@@ -13,3 +13,9 @@ test:
     - mkdir ~/ITKMinimialPathExtraction-build
     - docker run -v ~/ITKMinimalPathExtraction:/usr/src/ITKMinimalPathExtraction -v ~/ITKMinimalPathExtraction-build:/usr/src/ITKMinimalPathExtraction-build insighttoolkit/minimalpathextraction-test /usr/src/ITKMinimalPathExtraction/test/Docker/test.sh
 
+deployment:
+  hub:
+    branch: master
+    commands:
+      - docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
+      - docker push insighttoolkit/minimalpathextraction-test