remove interactive tty from docker run command, in sslproxy renew command

dockerfiles/services/sslproxy/cli/certbot/renew

@@ -42,7 +42,8 @@ restart_nginx() {
 
   containers=$(docker ps -q --filter "status=running" --filter "name=sslproxy_app")
   for c in $containers; do
-    docker exec -it $c nginx -s reload
+    echo -e "\033[94m$c\033[39m"
+    docker exec -t $c nginx -s reload
   done
 }