The argument for using containers is primarily in your first two steps, far less so for deployment and profit(!). Having all of your apps code and dependencies

The argument for using containers is primarily in your first two steps, far less so for deployment and profit(!). Having all of your apps code and dependencies in a self-contained, er...container, that was portable between different systems and perhaps more importantly, different developers, is arguably the main reason for using Docker. If for now it's just you and you're not planning on spinning up in AWS ECS, CloudRun, any flavour of Kubernetes etc. then go with what works for you. All good.