new

# File actionpack/lib/action_dispatch/middleware/static.rb, line 50
    def initialize(root, index: "index", headers: {}, precompressed: %[ br gzip ], compressible_content_types: /\A(?:text\/|application\/javascript)/)
      @root = root.chomp("/").b
      @index = index

      @precompressed = Array(precompressed).map(&:to_s) | ] identity ]
      @compressible_content_types = compressible_content_types

      @file_server = ::Rack::File.new(@root, headers)
    end