deploy

deploy.js

app.post('/deploy/', function (req, res) {  
     var spawn = require('child_process').spawn,
        deploy = spawn('sh', [ './deploy.sh' ]);

    deploy.stdout.on('data', function (data) {
        console.log(''+data);
    });

    deploy.on('close', function (code) {
        console.log('Child process exited with code ' + code);
    });
    res.json(200, {message: 'Github Hook received!'})
});

deploy.sh

git reset --hard origin/master  
git clean -f  
git pull  
git checkout master