Backend docker failing

[leticiaarj]

The django framework does not work correctly on Ubuntu and Windows operating systems.

[AmandaMuniz]

While implementing test cases in the backend, it was possible to notice that Django wasn't built correctly in the different operating systems. While working on Linux, it didn't build up on windows.

Not only that, but an import error was shown when trying to run the tests.

It is possible to see that in the Dockerfile, some parts of python were downloaded when the Docker documentation does not recommend this practice.

Because of this situation, it was necessary to apply changes in the Dockerfile to reduce the steps to build the application's Docker. These changes can be seen in the pull request present in the backend repository.