feature(deployment): support google-dns with certbot (#1)

Author: Dcooley1350

deployment/docker_compose/docker-compose.prod.yml

@@ -254,7 +254,8 @@ services:
 
   # follows https://pentacent.medium.com/nginx-and-lets-encrypt-with-docker-in-less-than-5-minutes-b4b8a60d3a71
   certbot:
-    image: certbot/certbot
+    image: "${CERTBOT_IMAGE:-certbot/certbot}" # Allows overriding the image for specific certbot variants (e.g., certbot/dns-google)
+    network_mode: ${CERTBOT_NETWORK_MODE:-bridge} # Allows setting the network mode, defaulting to bridge (e.g., 'host' to allow gcp instances to access the compute metadata server for auth)
     restart: unless-stopped
     volumes:
       - ../data/certbot/conf:/etc/letsencrypt

deployment/docker_compose/init-letsencrypt.sh

@@ -102,8 +102,12 @@ esac
 # Enable staging mode if needed
 if [ $staging != "0" ]; then staging_arg="--staging"; fi
 
+# Allows configuration of certbot auth method. Set default to webroot if not specified
+certbot_auth_args=${CERTBOT_AUTH_ARGS:-"--webroot -w /var/www/certbot"}
+
 $COMPOSE_CMD -f docker-compose.prod.yml run --name onyx-stack --rm --entrypoint "\
-  certbot certonly --webroot -w /var/www/certbot \
+  certbot certonly \
+    $certbot_auth_args \
     $staging_arg \
     $email_arg \
     $domain_args \