netlify.toml

[[headers]]
	for = "/*"
	[headers.values]
		# Netlify sets cache to 0 to allow rollbacks, but we use "cache buster"
		# query parameters for the backend, so we can just cache this.
		Cache-Control = "public, max-age=7776000"  # 90 days
		Access-Control-Allow-Origin = "*"

[[headers]]
	for = "/count.js"
	[headers.values]
		# Don't cache count.js too aggressively so changes don't take too long
		# to show up, but it's okay to cache for a few days.
		Cache-Control = "public, max-age=604800"  # 7 days
		Cross-Origin-Resource-Policy = "cross-origin"

[[headers]]
	for = "/count.v*.js"
	[headers.values]
		# The versioned count.js never change; we can cache very aggressively.
		Cache-Control = "public, max-age=31968000"  # 1 year
		Cross-Origin-Resource-Policy = "cross-origin"

# count.min.js no longer exists, so redirect to count.js
[[redirects]]
  from = "/count.min.js"
  to   = "/count.js"