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const cors = require('cors')();

// My Hello Function
function hello(req, res) {
  res.status(200)
    .send('Hello, Functions');
};

// CORS and Cloud Functions export
exports.hello = (req, res) => {
  cors(req, res, () => {
    hello(req, res);
  });
}

{
  "name": "function-hello",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "cors": "^2.8.5"
  }
}