Improved docker support

[vidz1979]

Migrated env.yml from ./src to project root.

Dockerfile:

• Now using node:18.16-bullseye-slim as base image
• Using multistage docker build
• Removed env vars from docker build in order to make it more generic
• Moved npm install earlier to speed up regular development
• Image size reduced from 1.53GB to 640MB :D

docker-compose.yml:

• Now using env.yml to set up docker container
• Integrated mongo and redis in docker-compose

[DavidsonGomes]

Very good, why not use node:18.16-alpine? the image size is even smaller

[vidz1979]

Yes, it's an option! I'll try that.