bump to v2 for Martin's changes

Dockerfile

-FROM dtucompute/sharelatex-enote:v1
+FROM dtucompute/sharelatex-enote:v2

build-sharelatex-enote.sh

 #!/bin/bash
 
 docker build sharelatex-enote -t sharelatex-enote
-docker tag sharelatex-enote dtucompute/sharelatex-enote:v1
+docker tag sharelatex-enote dtucompute/sharelatex-enote:v2
 docker login --username=dtucompute --password=da47c1aed914
-docker push dtucompute/sharelatex-enote:v1
+docker push dtucompute/sharelatex-enote:v2