text: from flask import Flask
  import os
  import socket
  
  app = Flask(__name__)
  
  
  @app.route("/")
  def hello():
      html = "<h3>Hello {name}!</h3>" \
             "<b>Hostname:</b> {hostname}"
      return html.format(name=os.getenv("NAME", "world"),
                         hostname=socket.gethostname())
  
  
  if __name__ == "__main__":
      app.run(host='0.0.0.0', port=5000)
  