Question about Trellis + caching. 'Leverage browser caching' Google PageSpeed

Thanks Ben - I tried re-provisioning using

ansible-playbook server.yml -e env=production

But it does not seem to have activated the cache. Looking in server.yml I can’t see any stage for the cache so I feel like I’ve taken the wrong step for re-provision. The link below says the server playbook is the right command for re-provision, feeling confused !