I have a working LAMP server that I used to set up a new website.
The server has a temporary domain pointing to it (e.g. acme-test.com) and I'm using Let's Encrypt to provide SSL.
Now that everything is set up ...
Running certbot for the new domain will likely take care of it fine. I'm assuming you haven't explicitly defined the temporary domain in the servername/serveralias variables but instead have a default vi...