Set dependencies for mmlc-api service

[UPstartDeveloper]

Hello, I noticed the comment by @reedstrm on line 11 of the docker-compose.yml file:

  # Hopefully moving api to the bottom will ensure that mongo and redis start up :yn:

I hope the PR helps fix the file, it sounded like the issue is we want to ensure that Mongo and Redis startup before the API does - so I added the following lines to the bottom, using the depends-on directive:

    depends_on:
      - mmlc-redis
      - mmlc-mongo

On a separate note, I think the other issue might be the Node version being used on the Dockerfiles.

For example, the Dockerfile currently uses version 10, but the batik dependency seems to require version 10, 12, or 14 (based on the following output I got in Terminal):

npm install batik
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: '[email protected]',
npm WARN EBADENGINE   required: { node: '^10 || ^12 || ^14' },
npm WARN EBADENGINE   current: { node: 'v15.3.0', npm: '7.0.14' }
npm WARN EBADENGINE }

Let me know if that helps!