a servlet to handle a GET request.

 <p>
 Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a
 GET request that returns no body in the response, only the request header fields.

 <p>
 When overriding this method, read the request data, write the response headers, get the response's writer or output
 stream object, and finally, write the response data. It's best to include content type and encoding. When using a
 <code>PrintWriter</code> objec