Updating Let's Encrypt Certs on Heroku

As a follow up to my post on Let's Encrypt Certs on Heroku, here is how you update your certs when it's three months in and they are expiring.

$ sudo certbot certonly --manual -d www.giftionary.city -d giftionary.city

Host the files it tells you to, then run:

$ sudo heroku certs:update /etc/letsencrypt/live/giftionary.city/fullchain.pem /etc/letsencrypt/live/giftionary.city/privkey.pem
Resolving trust chain... done
 ▸    Potentially Destructive Action
 ▸    This command will change the certificate of endpoint maiasaura-85929 from ⬢ giftionary.
 ▸    To proceed, type giftionary or re-run this command with --confirm giftionary

> giftionary
Updating SSL certificate maiasaura-85929 for ⬢ giftionary... done
Updated certificate details:
Common Name(s): www.giftionary.city
Expires At:     2017-03-26 15:45 UTC
Issuer:         /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
Starts At:      2016-12-26 15:45 UTC
Subject:        /CN=www.giftionary.city
SSL certificate is verified by a root authority.

And then you're done!