chore: set DNS_CHALLENGE=true in env.example

Author: abmruman

env.example

@@ -26,7 +26,7 @@ CA_SERVER=https://acme-staging-v02.api.letsencrypt.org/directory
 
 
 # dns challenge for wildcard certificate
-DNS_CHALLENGE=false
+DNS_CHALLENGE=true
 
 # Find your provider here https://docs.traefik.io/https/acme/#providers
 PROVIDER=digitalocean