Setup Localstack AWS S3 for local development

[hernanvicente]

What Issue Does This PR Cover, If Any?

A Docker environment was implemented to emulate the AWS S3 API locally for local development by adding its respective Dockerfile.dev and docker-compose.dev.yml. This setup allows us to add more AWS services without creating development credentials and provides a production-like environment.

Resolves #118

What Changed? And Why Did It Change?

• Rails runs the application in the development environment from its container
• Localstack emulates the AWS S3 service
• Postgresql runs in its container
• Active Storage uses the Amazon provider, and uploads are being stored in a local bucket
• A Makefile with make commands is in place, run make help to see a list of available options

How Has This Been Tested?

• Tests continue working from the host system
• We can run tests inside the container, try: make test

Please Provide Screenshots

Run the app and specs from the host system

docker.mp4

Run the app and specs from the host system

local.mov