atlas/web/_headers

/*
  Access-Control-Allow-Origin: *

# Hashed resources: 1 year and immutable

/_js/*
  Cache-Control: public, immutable, max-age=31536000

/_css/*
  Cache-Control: public, immutable, max-age=31536000

# Canvas images: 1 year

/_img/canvas/*
  Cache-Control: public, max-age=31536000

/_img/canvas/*.png
  Cache-Control: public, max-age=31536000

/_img/canvas/*/*.png
  Cache-Control: public, max-age=31536000