webhook timeout

GitHub gives application to respond to webhook in 10s. If reply is not received, the webhook is marked as failed due to time out 

Need to improve the jira card creation process speed. I feel not safe to response 200 until we added a new card.

References:
https://docs.github.com/en/webhooks/using-webhooks/best-practices-for-using-webhooks#respond-within-10-seconds

