Use Docker to Run ChromaDB

**Description**:
We need to containerize the ChromaDB database and ensure it runs consistently across different environments using Docker.

**Tasks**:

- [ ] Research and define a `Dockerfile` that installs and configures ChromaDB.
- [ ] Ensure the database can persist data by setting up appropriate volume mounts.
- [ ] Expose relevant ports for ChromaDB to allow access from other services.
- [ ] Write a `docker-compose.yml` file (optional) for easy setup if other services are needed alongside ChromaDB.
- [ ] Test the Docker setup to ensure that ChromaDB is running and accessible.
- [ ] Update the project documentation (`README.md`) with instructions on how to build and run ChromaDB using Docker.

**Acceptance Criteria**:
- ChromaDB is successfully running in a Docker container.
- Developers can easily set up the environment using Docker or Docker Compose.
- Documentation is updated to reflect the changes.

Start by reviewing the Python project setup, then define the Dockerfile and optional docker-compose.yml for ChromaDB. Verify persistent volume mounts, exposed ports, and that the container is accessible. Update README.md with build and run instructions, and confirm the documented Docker setup works.

Written by the indexing model from the issue text.