Deployment of Nodejs Code with Google Cloud - node.js

Question

I am trying to deploy my webapp code built on NODE JS. I deployed a simple application hello-world from
https://github.com/GoogleCloudPlatform/nodejs-docs-samples/tree/master/appengine/hello-world
and it worked.
Attached is my project structure.
In the client folder i have angular4 where the build files will be stored in public
In the server folder i have defined routes.
This setup is working find on my local. No errors.
But when i deploy it on google cloud i am getting
Error: Server Error
The server encountered a temporary error and could not complete your request.
Please try again in 30 seconds.
and error log says
Error: No default engine was specified and no extension was provided.
at View (/app/server/node_modules/express/lib/view.js:61)
at EventEmitter.render (/app/server/node_modules/express/lib/application.js:570)
at ServerResponse.render (/app/server/node_modules/express/lib/response.js:1008)
at (/app/server/app.js:42)
at Layer.handle_error (/app/server/node_modules/express/lib/router/layer.js:71)
at trim_prefix (/app/server/node_modules/express/lib/router/index.js:315)
at (/app/server/node_modules/express/lib/router/index.js:284)
at Function.process_params (/app/server/node_modules/express/lib/router/index.js:335)
at next (/app/server/node_modules/express/lib/router/index.js:275)
at Layer.handle_error (/app/server/node_modules/express/lib/router/layer.js:67)
Can anyone guide me on why this error?
My root package.json file to run npm start is
{
"name": "test-application",
"description": "A simple application for testers who run",
"version": "0.0.1",
"private": true,
"license": "Apache-2.0",
"author": "Alaksandar Jesus Gene",
"repository": {
"type": "git",
"url": ""
},
"engines": {
"node": ">=4.3.2"
},
"scripts": {
"deploy": "gcloud app deploy",
"start": "node server/app.js"
},
"dependencies": {
},
"devDependencies": {
},
"cloud-repo-tools": {
"test": {
"app": {
"msg": "Hello, world!"
}
},
"requiresKeyFile": true,
"requiresProjectId": true
}
}
And my app.yaml file is
# [START app_yaml]
runtime: nodejs
env: flex
skip_files:
- ^client$
# [END app_yaml]
Point to note, both files were copied from google sample github project and added values.
Project Folder Structure - Expanded
Project Folder Structure - Collapsed
Can anyone guide me on why this error?

Answer 1

Fixed it. My mistake in app.js coding
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
const http = require('http');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var api = require('./routes/api');
var app = express();
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, '../public')));
app.use('/api', api);
app.get('*', (req, res) => { //i think the issue was here. I had app.use
res.sendFile(path.join(__dirname, '/index.html'));
});
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
const port = process.env.PORT || '3000';
app.set('port', port);
const server = http.createServer(app);
server.listen(port, () => console.log(`Running on localhost:${port}`));
module.exports = app;