Apache, Let’s Encrypt, Wildcard, FreeBSD

It’s hunted me a long time that I want to config my web server to support subdomain like blows:

My awesome main page:
https://codingmelody.com

My awesome weather app:
https://awe.codingmelody.com

My awesome other app:
https://app1.codingmelody.com

And here is a good tutorial for detail: Creating Let’s Encrypt Free Wildcard SSL Certificates Tutorial