This PR accomplishes the following,

• Partially fixes Auto-update MindsDB Container When New Image is Released #6 by setting an 'always' pull_policy for the MindsDB image; this ensures that the latest image is pulled the first time a user installs it. However, subsequent update to the image are not handled by this.
• Partially fixes The Extension Binds the Ports Used by MindsDB #7 by removing the incorrectly bound port from before (8080) and binding the correct one (47335).
• Fixes Use Meaningful Service Name #8 by giving a meaningful name (mindsdb_service) to the MindsDB service that is run as part of the extension.
• Fixes Add a GitHub Action for CICD #9 by adding a GitHub Action to build and deploy the container on push to main. The version (tag) is maintained in a new VERSION file.
• Fixes Clean Extension Code #11 by removing unused files and making the project structure cleaner.