old_contents: import os
  from server.explorer import app
  
  if __name__ == '__main__':
      if os.getenv('FLASK_ENV', None) == 'PRODUCTION':
          app.run()
          print 'Running production app'
      else:
          app.run(debug=True)
          print 'Running app on localhost:5000'
new_contents: import os
  from server.explorer import app
  
  if __name__ == '__main__':
      if os.getenv('FLASK_ENV', None) == 'PRODUCTION':
          app.run('0.0.0.0')
          print 'Running production app'
      else:
          app.run(debug=True)
          print 'Running app on localhost:5000'
subject: update to runserver