netlify.toml

# Override default `deploy/public` build directory used by legacy branches
# https://app.netlify.com/sites/govuk-design-system-preview/configuration/deploys

[build]
  publish = "build"

# A number of the examples in the Design System include <form> elements so that
# users copying the examples have something that requires relatively little
# tweaking to work out the box (in particular Prototype Kit users, for example)
#
# We have some JavaScript to prevent those forms actually being submitted but
# for users who don’t have JavaScript enabled (or who manage to interact with
# the form before the JS has run) it’s still possible to submit the form.
#
# Handle that gracefully by redirecting to a page that explains what has
# happened and what the user needs to do next.
#
# POST requests work just fine. Requires examples to be set up with an action of
# `/form-handler`.

[[redirects]]
  from = "/form-handler"
  to = "/form-success"
  status = 301

# Redirect pages that have moved

[[redirects]]
  from = "/community/accessibility-strategy/"
  to = "/accessibility/accessibility-strategy/"
  status = 301

[[redirects]]
  from = "/patterns/telephone-numbers/"
  to = "/patterns/phone-numbers/"
  status = 301

# Proxy requests for security.txt to the centralised Cabinet Office
# vulnerability disclosure policy (VDP)
#
# https://github.com/alphagov/security.txt

[[redirects]]
  from = "/.well-known/security.txt"
  to = "https://vdp.cabinetoffice.gov.uk/.well-known/security.txt"
  status = 200 # Proxy rather than redirect

[[redirects]]
  from = "/security.txt"
  to = "https://vdp.cabinetoffice.gov.uk/.well-known/security.txt"
  status = 200 # Proxy rather than redirect

# Send different cache-control headers depending on the file path
#
# Asset filenames with fingerprint hashes (fonts, stylesheets, javascripts) are
# given an 'infinite' max-age since the content never changes.
#
# Historically, an 'infinite' max-age is the 32-bit maximum 2,147,483,648.
# https://datatracker.ietf.org/doc/html/rfc9111#section-1.2.2

[[headers]]
  for = "*.css"
  [headers.values]
    Cache-Control = "public,max-age=2147483648,immutable"

[[headers]]
  for = "*.js"
  [headers.values]
    Cache-Control = "public,max-age=2147483648,immutable"

[[headers]]
  for = "*.map"
  [headers.values]
    Cache-Control = "public,max-age=2147483648,immutable"

# Search index JSON with unique fingerprint
[[headers]]
  for = "/search-index-*.json"
  [headers.values]
    Cache-Control = "public,max-age=2147483648,immutable"

# Fonts from GOV.UK Frontend with unique fingerprints
[[headers]]
  for = "/assets/fonts/*"
  [headers.values]
    Cache-Control = "public,max-age=2147483648,immutable"