Fix Docker support for the app

[wmoussa-gc]

DO NOT MERGE
The deployment script actually looks for the tmp_Dockerfile and uses it as is. However, since we don't have access to the deployment process implemented by the cloud team, it will be difficult to fix this without risking production or staging.

[wmoussa-gc]

@shawnthompson Just an FYI on how I managed to get the app running locally. As discussed, the cloud team is not using MongoDB native but a Azure variant under their Cosmos DB service.

[shawnthompson]

@wmoussa-gc, what are your thoughts about, instead of renaming. Keeping the names as-is for the cloud hosting and using the typical file naming like the renaming you did to allow us to try to run docker locally for development? This way we are touching the files the cloud is dependent on and giving us the allowance to use docker locally instead of installing Mongo and node directly on our machines?