Unable to insert data into MongoDB installed on Google Cloud Platform (but it seems like MongoDB is connected)?

Question

All I want to do is install MongoDB Community Version on our Debian VM in Google Cloud Platform and insert any element in the database. (Don't want to use the preinstalled packages/ programs for sale on Google Cloud Platform).

I have been stuck on trying just to insert anything into mongodb. I dont know if it I installed something incorrectly or if my code is off (or if Google has restriction). I don't know what the problem is. If someone is kind enough to help out, I would really really appreciate it.

It is really long. Please if you have time, please help...

I followed the MongoDB installation first from:

Install MongoDB Community Edition - Debian

NPM MongoDB

Here is what I did, from beginning to end.

1:) Created a VM Debian 8.0 Machine on Google Compute Engine (Installing MongoDB and NodeJS)

Make Google Cloud Work:

1. Putty Key Generator

   • Generate
   • Move Mouse
   • Key Comment is Username
   • Key Passphrase is Password
   • Save Public & Private Key

2. Google Cloud Add SSH Key

   • SSH Keys
   • Edit
   • Copy Paste Putty Key Code

3. Google Cloud VM Instance

   • VM Instance
   • Create Instance
   • CentOS
   • SSH
   • View gcloud command
   • Run in Cloud Shell

4. Linux Code

   • cd /
   • sudo su
   • sudo apt-get update
   • sudo apt-get install apache2
   • sudo apt install php5
   • cd /var/www/
   • chmod -R 0777 html/
   • cd /etc/
   • chmod -R 0777 apache2/

5. PHPStorm

   • Tools > Deployment > Configuration...
   • STFP host: {IP ADDRESS}
   • Root Path: /var/www/html
   • Username: admin
   • Key Passphrase: password
   • {Remove index.html}
   • {Upload project}

6. Allow .htaccess

   • Run command: a2enmod rewrite
   • Change file /etc/apache2/apache2.conf
   • Replace in "AllowOverride None" to "AllowOverride All"
   • service apache2 restart

7. Install NodeJS

   • cd /var/www/html/backend
   • Go to website "https://github.com/nodesource/distributions
   • curl -sL https://deb.nodesource.com/setup_9.x | bash -
   • apt-get install -y nodejs
   • node -v
   • sudo apt-get update
   • sudo apt-get install build-essential libssl-dev
   • npm -v

8. Install Packages

   • cd /var/www/html/backend
   • {Have package.json already}
   • npm install express --save
   • npm install cors --save
   • npm install body-parser --save
   • npm install curl --save
   • npm install -g nodemon --save

9. Run NodeJS forever

   • cd /var/www/html/backend
   • npm install -g forever
   • sudo chown root /etc/rc.local
   • sudo chmod 755 /etc/rc.local
   • chmod -R 0777 /etc/rc.local
   • chmod -R 0777 /etc/init.d/rc.local

   • Edit rc.local file Before exit 0, add:

     sudo service mongod start

     cd /var/www/html/backend

     forever start -c nodemon server.js

   • Upload file to /etc and /etc/init.d

   • forever start -c nodemon server.js

10. Install MongoDB

    • cd /
    • sudo apt-get install git
    • sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
    • echo "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.2 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list
    • sudo apt-get update
    • sudo apt-get install -y mongodb-org
    • sudo service mongod start
    • service mongod status
    • cd /var/www/html/backend
    • npm install mongodb --save

11. Opened Port 8080 and 27017

============================================

2): The Relevant Code

So it seems that Mongodb is running and is connected. But when I want to insert data, the connection is disconnected on NodeJS. I dont know why. Here is the important relevant code:

On click, send data via AJAX to Node JS

function loginAdmin(){
    //Get elements
    const txtEmail = document.getElementById('txtEmail');
    const txtPassword = document.getElementById('txtPassword');
    const btnLogin = document.getElementById('btnLogin');

    //When all input in fields are made
    console.log("clicked");
            $.ajax({
                url: ipaddress.concat(':8080'),
                type: "POST",
                data: {
                    txtEmail: txtEmail.value,
                    txtPassword: txtPassword.value
                },
                success:function(data){
                    console.log(data);
                    return false;
                }
            });
    return false;
}

Insert Data to MongoDB

router.post('/', function(request, response) {
    var txtEmail = request.body.txtEmail;
    var txtPassword = request.body.txtPassword;

    mongo.connect("mongodb://"+ ipaddress +":27017/test", function(err, db) {
        db.collection('user-data').insertOne("223");
        txtEmail = "mongodb connecte22";
        response.send(txtEmail);
        response.end();
    });
});

Success that connection with MongoDB: Error when attempting to insert into MongoDB: