Update appointment table

[VonHohenheim]

• [x] Update client controller to add appointment when requesting an appointment
• [x] Update the appointment table to include user room keys

[VonHohenheim]

@dgghun you need to run these commands to update the db after this:

npx sequelize-cli db:migrate:undo:all npx sequelize-cli db:migrate npx sequelize-cli db:seed:all

[VonHohenheim]

Reopened due to updating client UI