Add Dockerfile to configuration

[loujaybee]

Currently all scripts are written in bash. However, both Codespaces, and Gitpod support Dockerfiles. We should add one for better portability, and improved caching:

• https://docs.github.com/en/codespaces/setting-up-your-project-for-codespaces/adding-a-dev-container-configuration/introduction-to-dev-containers#dockerfile

• https://www.gitpod.io/docs/configure/workspaces/workspace-image

[AbdassalamAhmad]

I would love to work on this issue, I just need a little bit more info.
I've tried creating a Dockerfile.
I've managed to make it install everything in main.sh script.

Is that all you need?
I see that you mentioned configuring postresql, GCP SDK, Is that also should be included in the Dockerfile?