title: Increase timeout from slack slash command in python "operation_timeout"
body: <p>I am running below python script which eventually runs shell script which gives me the list of running version in k8s namespace. Getting the result but it is taking time > 3sec. So, this is causing "operation_timeout" from slack. I am new to python, have gone with various docs regarding delay but that didn't help as those were very complex.</p>
  
  <pre><code>from subprocess import Popen, PIPE
  from subprocess import check_output
  from flask import Flask
  
  def get_shell_script_output_using_communicate():
      session = subprocess.Popen(['./version.sh'], stdout=PIPE, stderr=PIPE)
      stdout, stderr = session.communicate()
      if stderr:
          raise Exception("Error "+str(stderr))
      return stdout.decode('utf-8')
  
  def get_shell_script_output_using_check_output():
      stdout = check_output(['./version.sh']).decode('utf-8')
      return stdout
  
  app = Flask(__name__)
  
  @app.route('/test',methods=['POST'])
  def home():
      return '`Version List` ```'+get_shell_script_output_using_check_output()+'```'
  
  app.run(host='0.0.0.0', port=5002, debug=True)
  </code></pre>
  
  <p>Is there a way to get the response even if the command is taking more than 10sec? Thanks!</p>