Services vary a lot on how they are deployed and their dependencies, etc. The knowledge I have (and honestly I don’t have much) I just built over time, tinkering with different set-ups and trying to debug problems when they arose. So I guess just choose a few difference services and try to get them working (choose low-stakes ones at first, where the risk of getting pwned or losing everything is very low). Docker can abstract away a lot, so maybe try more direct deployments if you are interested in learning.
This is a bizarre article.
To frame that as “the UK has one of the lowest life expectancies among rich countries” is… misleading, to say the least. Why does Germany have one of the lowest life expectancies among rich countries? Why does Denmark?