get-course-info endpoint

[TheoKnoll]

In this PR, the get-course-info endpoint was created for the backend.

This endpoint returns 2 things (all packaged into one return)
1: All the information associated with a course_id and the semester
2: All of the course reviews associated with the course_id (across many semesters)

        params: query = {
                             "course_id": "the course_id",
                             "semester = "semester_in_words"
                        }

       Semester is of format Spring/Summer/Fall Year

       Example from COS 126, Fall 2021:
            query = { "course_id": "002051", "semester": "Fall 2021" }

Use command flask run to start the server.
I would suggest using Postman to make these queries, as that can make the testing process go straightforward.
This is a sample string if you'd rather test in your browser:
http://localhost:5000/api/get-course-info?course_id=002051&semester=Fall 2021

[bnehoran]

Nice work! I made some comments on specific parts of the code below.
In addition, would it be possible to also return the names of the professors who taught each previous iteration of the course, so that it can be displayed as it currently is in PrincetonCourses?

[bnehoran]

The formatting of one of these two lines is off. I know this is just documentation so it doesn't affect the functionality, but best to clean it before merging in.

[bnehoran]

Could you also specify what the format of the returned value is? I can find it by running it, but it's good to document the format.
Am I understanding correctly that the result is a list where the first element (position 0) is the information on the course, and the other elements of the list are evaluations? If so, is there possibly a neater way to format it? Perhaps as a dictionary with one key for info and the other key for evals? What do you think?

[bnehoran]

Thanks for documenting this! We should probably expand this readme even further at some point with more specific instructions, as well as an overview of the project (in a future pull request, of course, not here!).