Adds Slimmer to list of applications
Adds Slimmer to list of applications

Slimmer is a key part of how GOV.UK works. It should be imported
in the dev docs in the same way as govuk_app_config, which is also
a gem.

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs