Install postgress by running 'brew install postgresql'
Create a db
CD into 'postgressDBData' folder
Import db by running psql <db_name> < PostgresDBdata.pgsql
CD into 'express' folder
Run 'npm i express pg'
Run 'node index.js' to start express (need to have node.js installed already)
CD into 'react' folder
Run 'npm install'
Run 'npm start'