netlify.toml

# Settings in the [build] context are global and are applied to all contexts
# unless otherwise overridden by more specific contexts.
[build]
  # Directory to change to before starting a build.
  # This is where we will look for package.json/.nvmrc/etc.
  # If not set, defaults to the root directory.
#  base = "project/"

  # Directory that contains the deploy-ready HTML files and assets generated by
  # the build. This is relative to the base directory if one has been set, or the
  # root directory if a base has not been set. This sample publishes the
  # directory located at the absolute path "root/project/build-output"
  publish = "_site"

  # Default build command.
  command = "npm run build"

[[headers]]
  # Define which paths this specific [[headers]] block will cover.
  for = "/*"

  [headers.values]
    X-Frame-Options = "DENY"
    X-XSS-Protection = "1; mode=block"
    Content-Security-Policy = "frame-ancestors https://www.facebook.com"

    # Multi-value headers are expressed with multi-line strings.
	cache-control = '''
	max-age=0,
	no-cache,
	no-store,
	must-revalidate'''