Use lighter Docker image for faster deployment

[IgnacioHeredia]

Current image:

• tensorflow:2.16.1.
  Local size (cpu version) after build: 2.12 GB

Alternative options:

--> cons: no GPU image

• python:3.12-slim
  Extra packages needed: build-essential , python3-dev
  Local size after build: 939 MB

• ubuntu:22.04:
  Extra packages needed: python3, python3-pip, build-essential , python3-dev
  Local size after build: 831 MB

Results
We delay the decision until moving to new Jenkinspipeline, and we see how easy is to define two different base images (so we can have a light Ubuntu CPU version and a heavy Tensorflow GPU version).