BE: Interview Model + Routes

[bonnieli]

• interviews will have questions, participants (max 2 of each) - questions will be linked to participants, and participants will be users themselves
  • we may want to have some type of embedded document
  • need a basic questions model (that can be pre-filled with some basic data for now)
• a difficulty level overall for the questions
• in the future, we will want to store how the user did (feedback) in the interview model - don't worry about this let until we get to it
• We should be able to determine if an interview has started, and or finished, we can do that using a start time and end time One routes for now:
• Create a new interview by one user (automatically adding them as a participant)
• Get all current and past interviews (to show on the dashboard page)