old_contents: import flask
  import os
  
  SLACK_TEAM_NAME = os.environ.get('SLACK_TEAM_NAME')
  SLACK_TOKEN = os.environ.get('SLACK_TOKEN')
  
  app = flask.Flask(__name__)
  
  @app.route('/')
  def index():
      if SLACK_TEAM_NAME is None:
          return 'You need to set the \'SLACK_TEAM_NAME\' environment variable.'
      if SLACK_TOKEN is None:
          return 'You need to set the \'SLACK_TOKEN\' environment variable.'
      return 'This is where you put your email address.'
  
  @app.route('/invite', methods=['POST'])
  def invite():
      email = flask.request.form['email']
      return 'This is the part where I send an invitation to {}.'.format(email)
  
  def main():
      app.run()
  
  if __name__ == '__main__':
      main()
  
new_contents: import flask
  import os
  
  SLACK_FRIENDLY_NAME = os.environ.get('SLACK_FRIENDLY_NAME')
  SLACK_SUBDOMAIN = os.environ.get('SLACK_SUBDOMAIN')
  SLACK_TOKEN = os.environ.get('SLACK_TOKEN')
  
  app = flask.Flask(__name__)
  
  @app.route('/')
  def index():
      return flask.render_template('index.html', slack_friendly_name=SLACK_FRIENDLY_NAME)
  
  @app.route('/invite', methods=['POST'])
  def invite():
      email = flask.request.form['email']
      return 'This is the part where I send an invitation to {}.'.format(email)
  
  def main():
      app.run()
  
  if __name__ == '__main__':
      main()
  
subject: Update remiss.py