[Chore]: Dockerize Frontend and Backend for Development

**App Name:** `root`

**Description of Chore**
Create Dockerfiles for both the `web` and `backend` applications, and a `docker-compose.yml` file to orchestrate their local development setup, including MongoDB.

**Justification / Motivation**
This will significantly simplify the development environment setup for new contributors, ensuring consistency across different operating systems and reducing "it works on my machine" issues.