Revamped backend for datarink

1. Run npm install.
2. In config.js, specify DB_HOST, DB_NAME, DB_USER_MASTER, and DB_USER_MASTER_PASSWORD.
3. Create database tables by running node create-tables.js.
4. In config.js, follow the instructions for creating a database writer role (used by the game scraper). Fill in DB_USER_WRITER and DB_USER_WRITER_PASSWORD with this role's name and password.
5. In config.js, follow the instructions for creating a database reader role (used by the API). Fill in DB_USER_READER and DB_USER_READER_PASSWORD with this role's name and password.
6. Populate database using scrape-games.js. For example, node scrape-games.js 2016 20001-21230 save.
   • Use the save flag to save the downloaded json files. Replace this flag with local to use local files. If local is specified but a file is not found, it will be downloaded and saved.
   • save and local will save and load data from /scripts/raw-data/. The raw-data folder needs to be created before running the scraper.

• Use npm run dev to allow cross-origin requests for local development.
• To lint JavaScript, run npm run lint.