Backend: Add On-call Shift to Database

[elizabethfoster02]

Purpose
Currently, the Add On-Call Shift Modal does not add data to the correct table. When an on-call shift is created, add it to the on0-call database

TODO

• Claim this ticket by adding your name and moving to "In Progress"
• Get updated with the codebase
  • git checkout dev
  • git pull
  • THEN create a new branch as per usual
  • npm install (this updates your dependencies)
  • npm run dev
• Implement the description above
• Create a PR for this ticket
• Move this ticket into "Ready for Review"

Testing

• Desktop