Shallow git fetch regression in discourse_docker

This does not work because it happens after the code that fails because it cannot retrieve the version. What worked was to create a version.template.yml next to web.template.yml with the following content:

params:
  home: /var/www/discourse

run:
  - exec:
      cd: $home
      hook: code
      cmd:
        - git fetch --tags

And then include this file in containers/app.yml, before web.template.yml like so:

templates:
  - "templates/postgres.template.yml"
  - "templates/redis.template.yml"
  - "templates/version.template.yml"
  - "templates/web.template.yml"