Generate precache manifest for workboxSW.
_config.yml
workboxsw_helper:
workbox_url: "/workbox/workbox-sw.js"
clients_claim: "true"
skip_waiting: "true"
cache_first: "/\\.(?:png|gif|jpg|jpeg|svg|ico)$/"
precache:
- "/index.html"
- "/workbox/workbox-sw.js"
precache_all_regex: "\\.(?:png|gif|jpg|jpeg|svg|ico)$"