Feature: support 2 modes of docker images - local and registry

[evereq]

We need to make sure this project supports 2 modes for docker images/builds:

1. Local images (local builds for Docker images)

It means that developer pull latest code for Gauzy platform locally and when gauzy-pulumi running, it uses Docker to build docker images locally and next it push automatically such images to ECR (we have relevant code already) and use them

2. Registry images (no builds for Docker images needed)

It means that project will just use our latest docker images available (published) already to ECR and no need to run Docker builds locally! That will save time for someone who not interested to have a custom build, but more interested to just provision Gauzy into AWS (or other) Cloud as quickly as possible.