Express Production Setup - 4 | HELMET

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 Helmet helps secure Express apps by setting HTTP response headers.

it will remove all header from express app like

X-Powered-By: express 

we can remove using 
express.remove("x-powered-by");
but it's make it easy

* also help 
XSS attacks

index.js 

    import express from "express";
    import helmet from "helmet";

    const app = express();

    // Use Helmet!
    app.use(helmet());

    app.get("/", (req, res) => {
    res.send("Hello world!");
    });

    app.listen(8000);

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