AWS Lightsail

How to renew the https certificate?

Renew manually

sudo /opt/bitnami/ctlscript.sh stop
sudo /opt/bitnami/letsencrypt/lego --tls --email="ceo@zhikunlu.com" --domains="zhikun.lu" --path="/opt/bitnami/letsencrypt" renew --days 90
sudo /opt/bitnami/ctlscript.sh start

See https://docs.bitnami.com/aws/how-to/generate-install-lets-encrypt-ssl/ for auto renew.