netlify.toml

# example netlify.toml
[build]
  command = "npm run build"
  publish = "build"

[functions]
  directory = "functions"
  node_bundler = "esbuild"
  included_files = ["podcasts.yml", "talks.yml"]
  external_node_modules = ["mdsvex"]

[build.environment]
  NODE_VERSION = "16" 
  ## as of v0.334 sveltekit requires node 16 https://github.com/sveltejs/kit/pull/4922
  ## https://github.com/sveltejs/kit/issues/2687

[[headers]]
  ## https://answers.netlify.com/t/content-type-header-not-working-in-netlify-toml/7718
  for = "/*"
  [headers.values]
    X-Frame-Options = "DENY"
    X-XSS-Protection = "1; mode=block"
    X-Clacks-Overhead = "GNU Terry Pratchett"
    Cache-Control = "public, max-age=31536000" 
    # cache just over 1 hour for webpagetest to be happy
    X-Content-Type-Options = "nosniff"
    ## Content-Security-Policy = "default-src 'self'; script-src 'nonce-swyx'; img-src *"