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[malcolmm20]

Proposed Changes

Closes #307

• added get_detailed_posts function. Performs query that returns post with number of likes, views, and whether user has liked/viewed.
• changed the get_posts endpoint to call get_detailed_posts
• added unlike endpoint (DELETE /........./like)
• added unread indicator (dot to the right of the time on post card)
• added like button along with number of likes on posts