Explicit key length as the default changed

Author: tommoor

cert.sh

@@ -27,7 +27,7 @@ then
   export CF_Key=$CLOUDFLARE_API_KEY
 
   # Generate wildcard certificate (this will take approx 130s)
-  ~/.acme.sh/acme.sh --server letsencrypt --issue -d $DOMAIN  -d "*.$DOMAIN"  --dns dns_cf
+  ~/.acme.sh/acme.sh --server letsencrypt --issue -k 2048 -d $DOMAIN  -d "*.$DOMAIN"  --dns dns_cf
 
   # Update the certificate in the live app
   heroku certs:update "/app/.acme.sh/$DOMAIN/fullchain.cer" "/app/.acme.sh/$DOMAIN/$DOMAIN.key" --confirm $HEROKU_APP --app $HEROKU_APP