Integrate actions sdk with aws lambda - aws-lambda

Question

I am trying to develop a google assistant app with actions sdk. I found lot of samples online which all are using google's firebase cloud functions to deploy.
From this link(https://actions-on-google.github.io/actions-on-google-nodejs/) I also found that it is possible to deploy the actions sdk functions into aws lambda.
But unfortunately I did not find any sample which is showing how to write and deploy actions sdk into aws lambda.
Can anybody help me to write an application which is similar to the one shown here(https://github.com/actions-on-google/actionssdk-say-number-nodejs) and deploy it into aws lambda?
I tried the following to do the same. But it did not worked.
Created a folder and initialized it with "npm init".
Added index.js file.
Then ran the command "npm install actions-on-google". It appeared in the package.json file.
Created a zip folder of the entire source inside that folder I created.
Created a aws lambda function and uploaded the zip folder and set the "Handler" of the lambda function as "index.fulfillment".
Created an api gateway and linked it to the lambda function and deployed it.
Then took the url and editted the "actions.json" file and ran the gactions command.
Then when I started testing the app in the actions console using the simulator I am getting the error "UnparseableJsonResponse API Version 2: Failed to parse JSON response string with 'INVALID_ARGUMENT' error: "error_message: Cannot find field"
Here is the code inside index.js file
'use strict';
const {actionssdk, SimpleResponse} = require('actions-on-google');
const app = actionssdk({debug: true});
app.intent('actions.intent.MAIN', (conv) => {
conv.ask("welcome");
});
app.intent('actions.intent.TEXT', async (conv, input) => {
conv.ask('You said ' + input);
});
exports.fulfillment = app
Here is the cloud watch logs from aws
2018-11-10T08:35:46.715Z 9dbb17f8-e4c3-11e8-bce3-730a5244a300
{
"errorMessage": "Cannot convert undefined or null to object",
"errorType": "TypeError",
"stackTrace": [
"Function.keys (<anonymous>)",
"Lambda.<anonymous> (/var/task/node_modules/actions-on-google/dist/framework/lambda.js:36:36)",
"Generator.next (<anonymous>)",
"/var/task/node_modules/actions-on-google/dist/framework/lambda.js:22:71",
"new Promise (<anonymous>)",
"__awaiter (/var/task/node_modules/actions-on-google/dist/framework/lambda.js:18:12)",
"/var/task/node_modules/actions-on-google/dist/framework/lambda.js:30:46",
"omni (/var/task/node_modules/actions-on-google/dist/assistant.js:44:53)"
]
}

Answer 1

The code changes to host it on AWS are fairly straightforward. Instead of importing the firebase-functions library and using it, you just need to establish the lambda endpoint with the dialogflow app itself. So the code might look something like:
const { dialogflow } = require('actions-on-google')
const app = dialogflow()
// Setup intent handlers with app.intent() here
exports.factsAboutGoogle = app