The MS365DSC https://microsoft365dsc.com/ is an extensive powershell module that allows exporting, importing, monitoring, comparing and automating 365 conifigurations.
It is a very capable and a very active Open Source gitHub project.
I just used it for comparing two configs on different Tenants, and it works very well. -highly recommended for this kind of task.
Docker networking is just awesome. -if you enjoy networking. Especially check out the IPVLAN L3 functionality, it is really nice. Learn
Open source By utilizing completely free community driven Open source software you can organize all your logs. I can highly recommend
Sometimes we might run into a DNS replication problem in the public domain. This might be because of a DNSSec issue