I am looking for where I could download the correct version of ubuntu to create an exact replica of digital ocean's one click. I want to test out some config locally on a flight where I will not have internet so no SSH login
You can download old Ubuntu ISO's from here.
http://old-releases.ubuntu.com/releases/
Then install in a virtual machine on your laptop.
Don't think DO does anything to the base images.
I use Vagrant for WordPress development. Not sure if internet access is required or not. Hard to get working and you need a computer with some RAM, but debugging is awesome this way.
https://premium.wpmudev.org/blog/vagrant-wordpress-test-environment/
Hope it helps. :)
Thanks, that looks interesting at first glance but I am not doing WordPress so won't work for me. I am doing custom MERN application.