C-Find and DICOMweb studies query

[wayfarer3130]

There should be a way to query the DICOMweb server for what studies are available. The suggestion is to use MongoDB, either locally or in a cloud deployment to store the study query JSON objects, and then allow them to be queried in order to respond to the query objects. MAYBE the patient level query should also be done. Then, use this to add the dimse C-Find and a lambda service to perform a C-Find. The lambda service can be called by http-server running locally, and by deploying to a lambda service for cloud deployments.