Please provide a JSON object, and only a JSON object, that contains the following fields:

'code': a string that is a fully functional code snippet for a simple Node.js Express server that serves static files from the 'public' directory
'description': a brief description of the server code
'dependencies': an array of the dependencies needed for the server code
'additionalInformation': any additional important information about the server code
Please refrain from providing any additional information or comments outside the JSON object. In your entire response, the letter y should appear less than 33.
user