Add Dockerfile for reproducible development environment

[Apprentice2907]

Fixes: #16

Overview

This pull request introduces a Docker-based setup to provide a reproducible and consistent environment for running the CMS project.

Changes Made

• Added a Dockerfile with a Python-based environment
• Included Jupyter Lab support for interactive experimentation
• Documented build and run instructions in the README

Why This Is Useful

• Ensures consistent dependencies across different systems
• Simplifies onboarding for new contributors
• Makes demos and experimentation easier without local setup issues

How to Test

1. Build the image:

   docker build -t cms-ml4sci .