Assumes you have a database and service account with appropriate permissions created.

1. Add this buildpack to the build stack.

   $ heroku buildpacks:add --index https://github.com/clowder/heroku-buildpack-cloud-sql-proxy.git

2. Set an environment variable containing you're service accounts JSON access key.

   heroku config:set GCLOUD_CREDS="$(cat <PATH_TO_KEY_JSON>)"

3. Set an environment variable containing the connection name of the instance you're connecting to.

   heroku config:set GCLOUD_SQL_INSTANCE=<INSTANCE_CONNECTION_NAME>

4. Update your Procfile to launch you're web process via the wrapper script.

   web: start-cloud-sql-proxy bin/rails server -p ${PORT:-5000} -e $RAILS_ENV