fix incomplete SSL chain error

fixes #2804

certbot/run-certbot.sh

@@ -3,5 +3,7 @@
 letsencrypt certonly --webroot -w /var/www/letsencrypt -d "$CN" --agree-tos --email "$EMAIL" --non-interactive --text
 
 cp /etc/letsencrypt/archive/"$CN"/cert1.pem /var/certs/"$CN"-cert1.pem
+cp /etc/letsencrypt/archive/"$CN"/chain1.pem /var/certs/chain1.pem
+cp /etc/letsencrypt/archive/"$CN"/fullchain1.pem /var/certs/fullchain1.pem
 cp /etc/letsencrypt/archive/"$CN"/privkey1.pem /var/certs/"$CN"-privkey1.pem