How to modify the rate limit settings for BTE TRAPI API

1. Go to config file at: https://github.com/biothings/BioThings_Explorer_TRAPI/blob/master/src/config/index.js
2. Go to the setLimiter function
3. Currently set as max 3 requests/min/IP

const limiter = rateLimit({`
   windowMs: 1 * 60 * 1000, //1min`
   max: process.env.MAX_QUERIES_PER_MIN || 3 //3 requests`
});

4. You can modify the values of windowMs or max to overwrite the default settings.
5. Detailed documentations can be found at: https://www.npmjs.com/package/express-rate-limit