Dummy Nostr HTTP AUTH endpoint for NIP-98

DummyNostrHttpAuthEndpoint.rb

require 'sinatra'

get '/public/AUTHIMAGE.jpg' do
  auth_header = request.env['HTTP_AUTHORIZATION']
  puts auth_header

  # Check if the header value starts with "Nostr "
  unless auth_header && auth_header.start_with?("Nostr ")
    headers['WWW-AUTHENTICATE'] = 'NOSTR-NIP-98'
    headers['Access-Control-Expose-Headers'] = 'WWW-Authenticate'
    headers['Access-Control-Allow-Origin'] = '*'
    halt 401, 'Unauthorized'
  end

  begin
    # Read the image file
    file_path = 'public/AUTHIMAGE.jpg'

    if File.exist?(file_path)
      send_file file_path, type: 'image/jpeg'
    else
      halt 404, 'Not Found'
    end
  rescue
    halt 500, 'Internal Server Error'
  end
end

# Start the Sinatra server
set :port, 9550