This is the app that we used for the SRE webinar. Start it by running
./start_app.sh.
You can access the app by navigating your web browser to http://localhost.
There are several branches describing the various stages of SRE-ifying this app.
To see them, execute git branch -a. To start the app in any of these branches,
add BRANCH=<branch_name> before ./start_app.sh.