code: public HttpServerBuilder contentFrom(final String path, final URL resource) {
          resources.put(path, resource);
          return this;
      }
docs: Defines a file to be hosted on the specified path. The file's content is provided by the specified URL.
  @param path
  the path where the file is accessible from the server
  @param resource
  the resource providing the content for the file
  @return
  this builder