text: """Main application module"""
  import os
  import json
  import jsend
  import sentry_sdk
  import falcon
  from .resources.twilio import TwilioService
  from .resources.welcome import Welcome
  
  def start_service():
      """Start this service
      set SENTRY_DSN environmental variable to enable logging with Sentry
      """
      # Initialize Sentry
      sentry_sdk.init(os.environ.get('SENTRY_DSN'))
      # Initialize Falcon
      api = falcon.API()
      api.add_route('/welcome', Welcome())
      api.add_route('/twilio-sms', TwilioService())
      return api
  
  def default_error(_req, resp):
      """Handle default error"""
      resp.status = falcon.HTTP_404
      msg_error = jsend.error('404 - Not Found')
  
      sentry_sdk.capture_message(msg_error)
      resp.body = json.dumps(msg_error)
  
  