Simple nginx config that will look for any running docker instances with specific env variables and front for them.
The containers need to share a network to make this work.
Example env variables for a container.
VIRTUAL_HOST: $COBRA_DOMAIN
VIRTUAL_PORT: 3000
LETSENCRYPT_HOST: $COBRA_DOMAIN
LETSENCRYPT_EMAIL: website@nisei.net
VIRTUAL_PORT is what the application to serve is exposed on.
LESTENCRYPT_HOST and LETSENCRYPT_EMAIL are used to register and renew SSL certificates.