DevSecOps, Containers, and Shift-Left, are those just Buzzwords? And why should we Care?

Are you thinking about using Containers? Why should I worry about security? Why is everything Dev<insert something here>Ops? Isn’t shift left just a fancy way of saying ‘do it earlier’? Let's talk about real life experiences and what are some of the reasons why we should worry about the details and show some practical hands on way to get started.