swagger doc integration initial commits

[DulanjaliSKoswatte]

Fixes CWE 16 and CWE 264 in stackle-api

Changes proposed in the pull request

Stackle-master\stackle_api\server.js

const helmet = require('helmet')
app.use(helmet.frameguard())

app.use(function (err, req, res, next) {
res.header("Access-Control-Allow-Origin", "http://localhost:8080");
res.header('Access-Control-Allow-Methods', 'GET, PUT, POST, DELETE, OPTIONS');
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
console.error(err.stack);
res.status(500).send('Something broke!')
});

Impact

HTTP Header level validation

Other information

Check if you have done the following before creating the PR

• console logs have been deleted
• No commented code (If commented the reasons are given)

Stackle-master.zip
Cross-Domain Misconfiguration.docx
X-Frame-Options Header Not Set.docx