Use docker compose to create a composite container instead of using Dockerfiles

[lastlegion]

Currently we're shipping multiple services in the LoaderDockerContainers:
These include:

• Image Loader API
• Annotation Loader API

Ideally we should be striving for 1 service per container. We can package these things together using Docker compose.

Also for certain applications we might want to scale out 1 service(say Annotation Loader API) but not the image Loader API since for lot of our usecases we load images only once but annotations are loaded throughout the lifetime of the deployment.

It also makes testing these individual components easier.

[lastlegion]

Created seperate dockerfiles for
AnnotationLoader API: camicroscope/uAIMDataLoader@ee7a438
ImageLoader: camicroscope/ImageLoader@be23991