Lab 3, 4 & 5 VCNT- Metric Converter

1. SET NODE_ENV to test without quotes
2. Most logic will need done in controllers/convertHandler.js but do complete routes/api.js
3. You will add any security features to server.js
4. You will create all of the functional/unit tests in tests/2_functional-tests.js and tests/1_unit-tests.js
5. You will create all of the coverage work in tests/convertHandler.test.js