Domain not working without www

If I follow the instructions and create my .conf like this

```
server_name         www.devenv.ai devenv.ai;
ssl_certificate     /etc/letsencrypt/live/www.devenv.ai/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/www.devenv.ai/privkey.pem;
```

my website only works with www. How can I get it to work for devenv.ai alone too?