Dynamically build container for ACA deployment

[iMicknl]

Currently we do leverage the Docker container published on the ghcr.io of this repository, but eventually most users will want to make code changes and deploy them.

We could leverage AZD to dynamically build and deploy the Docker container to ACA.

See https://github.com/Azure-Samples/azure-search-openai-demo/blob/84cf73e7e2b7238ba0f1c54744435cb7397d1ba9/azure.yaml#L13