Revert "Remove MongoDB badge (GoogleCloudPlatform#302)" (GoogleCloudPlatform#303)

This reverts commit 30d6257.

Author: Ace Nassri

7-gce/README.md

@@ -1,9 +1,10 @@
 # 7 - Deploying to Google Compute Engine
 
-![Cloud SQL Build Status][ci-badge-cloudsql] ![Datastore Build Status][ci-badge-datastore]
+![Cloud SQL Build Status][ci-badge-cloudsql] ![Datastore Build Status][ci-badge-datastore] ![MongoDB Build Status][ci-badge-mongodb]
 
 [ci-badge-datastore]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/7-datastore.svg
 [ci-badge-cloudsql]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/7-cloudsql.svg
+[ci-badge-mongodb]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/7-mongodb.svg
 
 This folder contains the sample code for the [Deploying to Google Compute Engine][step-7]
 tutorial. Please refer to the tutorial for instructions on configuring, running,

optional-kubernetes-engine/README.md

@@ -1,9 +1,10 @@
 # Deploy Bookshelf to Google Kubernetes Engine
 
-![Cloud SQL Build Status][ci-badge-cloudsql] ![Datastore Build Status][ci-badge-datastore]
+![Cloud SQL Build Status][ci-badge-cloudsql] ![Datastore Build Status][ci-badge-datastore] ![MongoDB Build Status][ci-badge-mongodb]
 
 [ci-badge-datastore]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/o-datastore.svg
 [ci-badge-cloudsql]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/o-cloudsql.svg
+[ci-badge-mongodb]: https://storage.googleapis.com/nodejs-getting-started-tests-badges/o-mongodb.svg
 
 This optional tutorial will walk you through how to deploy the Bookshelf sample application to [Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine/). This tutorial is also applicable to [Kubernetes](http://kubernetes.io/) outside of Google Kubernetes Engine, but may require additional steps for external load balancing.