Add Dockerfile and docker-compose.yml for containerization

**Description:**
I would like to propose adding a Dockerfile and docker-compose.yml to the repository to simplify the setup, improve consistency, and provide an easier way for both developers and users to get the project up and running in any environment.

**Benefits:**
- **Consistency across Environments:** Docker containers ensure that the application runs the same way in every environment, eliminating "works on my machine" issues.
- **Easy Setup:** A single `docker-compose up` command can bring up all required services and dependencies, streamlining the setup process for new developers and contributors.
- **Simplified Deployment:** With Docker, the project can be easily deployed to cloud platforms or container orchestration tools like Kubernetes.

**Proposed Files:**
1. **Dockerfile:** Builds the Docker image with all dependencies needed to run the application.
2. **docker-compose.yml:** Manages the application's services (e.g., app and database) and orchestrates their interaction.