Remove Unused Dependencies from ContainerService

[BenGalewsky]

Problem

There is a dangling dependency on SQLAlchemy in requirements.txt - this library now has a vulnerability and is failing the safety check. It's not a good idea to have libraries floating around that we don't need.

Approach

Remove this and see if there are other unused libraries.

Also look at the Dockerfile to see if we need the apt packages that are installed:

RUN apt-get update && \
    apt-get install -y  gcc musl-dev && \
    apt-get install -y  postgresql libffi-dev g++ make git