Update Docker Setup and Configuration

[AlexPyslar03]

This pull request includes updates to the Docker setup and configuration for the music bot project. Key changes include:

• Updated the Dockerfile to allow for environment variables to be set directly through Docker Compose using the -e flag, removing the dependency on the .env file.
• Modified the docker-compose.yml to support configuration through environment variables set in docker-compose without relying on the .env file.
• Added detailed instructions to the README for building and running the Docker image, as well as using docker-compose for easier management of the container.

These updates aim to simplify the setup and deployment process by leveraging Docker Compose for environment variable management.

Changes:

• Updated Dockerfile to support dynamic environment variable configuration.
• Modified docker-compose.yml for easier deployment with customizable environment variables.
• Updated the README with instructions for building and running the bot using Docker and Docker Compose.

Let me know if there are any questions or further adjustments needed.

[BoredKevin]

why would it need to expose port 3000 ?