Define Event schema

[cbchien]

User Story:

As a admin, I want to have a data schema for storing Event information and data so that I can have a consistent data structure to read and update event database

Acceptance Criteria:

• [x] event title
• [x] date
• [x] description
• [x] RSVP list
• [x] participant capacity
• [x] cost
• [ ] other fields that you think will be required/useful

Examples and resources: https://www.mongodb.com/blog/post/6-rules-of-thumb-for-mongodb-schema-design-part-1 https://docs.mongodb.com/v3.4/core/data-model-design/

[cbchien]

Task completed. Merged pull request #15

[GlynL]

merge request #16