Feature backend neo4j seed data

[montekaka]

1. Adds neode package to interact with Neo4j
2. Adds Neo4j driver configuration variables to .env file
3. Adds mock data (/server/libs/data_dump)
   • volunteers
   • certifications
   • volunteer's certification expiration
   • sign offs
4. Adds seed and dropDB to the "scripts" property of the package.json file
   • use npm run seed to import mock data into db
   • use npm run dropDB to delete all imported data from db
5. Adds Person model, controllers, and router
   • List of endpoints
     • Person CRUD
       • POST: 'api/person'
       • GET: 'api/person'
       • GET: 'api/person/:id'
       • PUT: 'api/person/:id'
       • DELETE: 'api/person/:id'
     • Person's certification
       • GET: 'api/person/:id/certification'
       • POST: 'api/person/:id/certification'
     • Person's sign offs certification
       • GET: 'api/person/:id/signoffs'
6. Adds Certification model, controllers, and router
   • List of endpoints
     • GET: 'api/certification'
     • POST 'api/certification'

[codydaig]

PR #6 has all your changes so closing this one in favor of #6.