Letsencrypt certificate expiring soon and need renew

Describe your question in as much detail as possible:

• What are you seeing, and how does that differ from what you expect to see?
  I’m using Gitlab CI to manage my projects and have set up a group Kubenetes cluster with Cert-Manager installed. Last week I have received an email from letsencrypt.org saying the certificate is going to expire soon, so my question is, do I need to manually renew the certificate myself? If that is the case, how to renew? I searched around and couldn’t find any useful information for renewing letsencrypt certificate if I’m just a Gitlab CI user.

• Consider including screenshots, error messages, and/or other helpful visuals

• What version are you on? Are you using self-managed or GitLab.com?
  I’m using GitLab CI from GitLab.com

  • GitLab (Hint: /help):
  • Runner (Hint: /admin/runners):

• Add the CI configuration from .gitlab-ci.yml and other configuration if relevant (e.g. docker-compose.yml)

• What troubleshooting steps have you already taken? Can you link to any docs or other resources so we know where you have been?

Thanks for taking the time to be thorough in your request, it really helps!

Can anyone who is knowledgable of this question take a look? Thank you!

Hope someone can help on this. Thank you.