AWS lambda deploy

lambda.js

const awsServerlessExpress = require('aws-serverless-express');
const app = require('./app');
const server = awsServerlessExpress.createServer(app)

module.exports.universal = (event, context) => awsServerlessExpress.proxy(server, event, context);

local.js

const app = require('./app.js');

// Server listen
const port = process.env.PORT || 3000;
app.listen(port, () => {
        console.log("Server listening to port: "+port);
});

serverless.yml

service: api-gateway-demo

provider:
 name: aws
 runtime: nodejs14.x
 stage: production
 region: ap-south-1

functions:
 api:
   handler: lambda.universal
   events:
     - http: ANY {proxy+}
     - http: ANY /