add optional e-mail

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     image: bitdeals/certbot
     environment:
       - DOMAIN=
+      - EMAIL=
     volumes:
       - certificates:/etc/certificates
       - letsencrypt:/etc/letsencrypt

docker/scripts/0-create-cert.sh

@@ -10,13 +10,19 @@ if [ ! -f /etc/certificates/site.pem ]; then
   cat site.key site.crt >> /etc/certificates/site.pem
 fi
 
+# check e-mail for letsencrypt notifications
+if [ -n "$EMAIL" ]; then
+  CERTBOT_OPTS="--email $EMAIL"
+else
+  CERTBOT_OPTS="--register-unsafely-without-email"
+fi
 
 if [ -n "$DOMAIN" ]; then
 
   # Request certificate
   certbot certonly --standalone \
     --non-interactive --agree-tos --http-01-port=380 \
-    --register-unsafely-without-email \
+    "$CERTBOT_OPTS" \
     --cert-name "$DOMAIN" \
     -d "$DOMAIN"