Today I have continued my journey with Docker. To be honest I did try and learn Docker about 6 months ago and I have completed a Docker CTF on TryHackMe but I don't think I fundamentally understood it, how it works and how to create containers.
I decided to take an excellent course on Linkedin by Carlos Nunez that has some really good exercises that include demonstration codes and containers to play with. I managed to create several containers and run them, including a web server.
Still lot's to learn about Docker but this is a good start.