Upgrade Mongo and Ubuntu

This PR:

* Upgrade MongoDB to version 3.2.9-2.1;
* Upgrade Ubuntu to 16.04;
* Fix Readme;

Dockerfile

@@ -1,10 +1,10 @@
-FROM ubuntu:14.04
+FROM ubuntu:16.04
 MAINTAINER Jadson Lourenço <[email protected]>
 LABEL Description="Percona MongoRocks"
 
 RUN apt-get update && apt-get install -y curl && \
-  curl -s -o /tmp/psmdb-3.2.4-1.0-rc2-r21-trusty-x86_64-bundle.tar https://www.percona.com/downloads/percona-server-mongodb/percona-server-mongodb-3.2.4-1.0rc2/binary/debian/trusty/x86_64/psmdb-3.2.4-1.0-rc2-r21-trusty-x86_64-bundle.tar && \
-  tar -xf /tmp/psmdb-3.2.4-1.0-rc2-r21-trusty-x86_64-bundle.tar -C /tmp/ && \
+  curl -s -o /tmp/percona-server-mongodb-3.2.9-2.1-rd497c75-xenial-x86_64-bundle.tar https://www.percona.com/downloads/percona-server-mongodb-3.2/percona-server-mongodb-3.2.9-2.1/binary/debian/xenial/x86_64/percona-server-mongodb-3.2.9-2.1-rd497c75-xenial-x86_64-bundle.tar && \
+  tar -xf /tmp/percona-server-mongodb-3.2.9-2.1-rd497c75-xenial-x86_64-bundle.tar -C /tmp/ && \
   dpkg -i /tmp/percona-server-mongodb-*.deb && \
   apt-get remove -y curl && \
   rm -rf /var/lib/apt/lists/* && rm -rf /tmp/*

README.md

@@ -2,7 +2,7 @@
 
 ## How To Use
 ```
-docker run -d -p 27017:27017 -e DB_USER=test -e DB_PASS=test -e DATABASE=mongorocks jadsonlourenco/mongo-rocks:1.1.0
+docker run -d -p 27017:27017 -e DB_USER=test -e DB_PASS=test -e DATABASE=mongorocks jadsonlourenco/mongo-rocks
 ```
 
 ## Environment Variables