The CI scripts are configurable through the environment. They had
hardcoded configurations before. The Australian BuildKite setup will
need global environment variables like this:
STAGING_SSH_HOST=ofn-staging2
STAGING_CURRENT_PATH=/home/openfoodweb/apps/openfoodweb/current
STAGING_SERVICE=unicorn_openfoodweb
STAGING_DB_HOST=localhost
STAGING_DB_USER=openfoodweb
STAGING_DB=openfoodweb_production
PRODUCTION_REMOTE=production:/home/openfoodweb/apps/openfoodweb/current
Buildkite is running tags like branches. This caused `git branch`
commands to fail. The function got extended to handle tags as well.
Ideally, Buildkite will offer an option not to rebuild tags.