Update express to 4.14.0

- Blog post: http://expressjs.com/en/changelog/4x.html#4.14.0
- Changelog: https://github.com/expressjs/express/blob/master/History.md#4140--2016-06-16

bitnami/express/Dockerfile

@@ -26,10 +26,9 @@ ENV PATH=/opt/bitnami/node/bin:/opt/bitnami/python/bin:$PATH \
 
 ## STACKSMITH-END: Modifications below this line will be unchanged when regenerating
 
-
 # ExpressJS template
 ENV BITNAMI_APP_NAME=express
-ENV BITNAMI_IMAGE_VERSION=4.13.4-r4
+ENV BITNAMI_IMAGE_VERSION=4.14.0-r0
 
 RUN npm install -g express-generator@4
 
@@ -44,7 +43,7 @@ USER bitnami
 # so we will not download any other version
 # It also generates the cache in ~/.npm
 RUN mkdir ~/test_app && cd ~/test_app &&\
- npm install express@4.13.4 &&\
+ npm install express@4.14.0 &&\
  express -f . && npm install && sudo rm -rf /tmp/npm* ~/test_app
 
 WORKDIR /app