Provide Dockerfile for reproducible environment

[Ankitaghavate]

• Why: Makes it easy for users to run code with exact dependencies and simplifies demos.

• Sample body: Add Dockerfile and README section describing how to build and run the container, mount notebooks, and optionally expose Jupyter.
  Labels: enhancement, documentation

[invo-coder19]

@Ankitaghavate, looking forward to solve it.