Dockerize Backend Services

Right now both a back end and a front end are required for a developer to work on this repo (even for any front-end-only issue). The installation of a local backend is not friendly to a front end developer.

To ease front end development, we can dockerize the backend services (such as web server and DB server). `Adage-server` repo is using docker now:
https://github.com/greenelab/adage-server

We can tailor the Dockerfiles there for this project.

Start by reviewing the Dockerfiles and setup in the linked Adage-server repository, then inspect this repository's backend web-server and database requirements. Tailor the relevant container setup for this project and verify that front-end-only development no longer requires a locally installed backend.

Written by the indexing model from the issue text.