FEATURE REQUEST:Add Docker support to containerize Devr.AI for easy local setup

### Is your feature request related to a problem?

- [x] Yes, it is related to a problem

### Describe the feature you'd like

Currently, Devr.AI does not support Docker-based setup.
This makes local development and onboarding contributors harder,
as the environment must be configured manually.

Proposed solution:
- Add Dockerfile for frontend and backend (if applicable)
- Add docker-compose.yml to run the full stack
- Document Docker-based setup steps in README

Benefits:
- Faster onboarding for contributors
- Consistent development environment
- Easier testing and deployment

I would like to work on this issue if approved.

### Record

- [x] I agree to follow this project's Code of Conduct
- [x] I want to work on implementing this feature