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export my localhost server ( node js ) online with a web server like apache

I just made a simple chat-service with Node JS and I want to publish It " Online " ; at the time I used Ngrok and Localtunnel , but they are very limited , therefore I saw Apache web Server but I have not found tutorial on how to use it.
Thanks and hope you can help me.

Ngrok and Localtunnel are services which let you open a connection from inside your network to an external server which then forwards traffic back down the tunnel so clients on the Internet can make requests to your service running inside your LAN.
Apache is HTTP server software. It is nothing like Ngrok and Localtunnel.
While you can set up a reverse proxy using it, for that to use useful in this use case you would have to install it in your router … and most routers don't let you install software on them.
You could possibly run it on a computer inside your LAN and then configure port forwarding on the router … but if you are going to do that then you might as well forget about Apache HTTPD and just forward traffic directly to the service you've written using Node.js.
There are security risks and bandwidth considerations to take into account when running services from your LAN. It's almost always a better idea to just invest in a proper hosting service like Amazon AWS, DigitalOcean Droplets, or Heroku.

By "online" I suppose you mean to host it globally. For that my friend you will be in need of a server (preferably a cloude server) and a static IP address. Both of these are provided by a lot of providers like aws, digitalocean etc as a platform as a service, which we can leverage. So pls do the following:
Register for a cloud service (aws, digitalocean, gcp etc.).
Create a server instance of an operating system of your choice (my pref would be a linux instance).
Attach a public static ip to the server.
Log into the server. (SSH is the most secure way and most providers provide this to log into your server).
Install dependencies (in your case NodeJS etc).
Make sure that the port in which the app is hosted is open publicly. Most providers provide a dashboard in which you can configure port settings.
Use Apache or Nginx for configuring a reverse proxy (this is just for keeping your environment secure)

Deploying react js and node js full stack on AWS production?

I have currently deployed the React and Node.js on nginx which sits on AWS . I have no issues in deployment and no errors.
The current environment is: PRODUCTION.
But I have a doubt whether the method I follow is right or wrong. This is the method I followed, https://jasonwatmore.com/post/2019/11/18/react-nodejs-on-aws-how-to-deploy-a-mern-stack-app-to-amazon-ec2
The following is my nginx configuration
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
root /var/apps/front_end/build;
try_files $uri /index.html;
}
location /api/ {
proxy_pass http://0.0.0.0:3005/;
}
As shown above , I have copied the build folder after npm run build to the AWS instance and gave the location to nginx and the backend is copied as it is to the AWS instance and I gave npm start it runs on 3005 port , I gave that IP to /api location to proxy pass
I see a couple of others using server.js for the front end and putting the build folder files there and setting up the nginx to that server.js .
So should I do it that way ? or am I good with the current method as seen in the link above ?

Just like everything else, there are multiple ways to go about this. Depending on the way you have ended the question looks like you are open to exploring them.
Here are my preferences depending on the increasing order of responsibilities on my side vs what AWS handles for me:
AWS Amplify :
Given that you are already using React and Node, this will be a relatively easy switch. Amplify is a not only a set of very useful frontend framework by makeing it easy to add functionalities like Authentication, Social Logins, Rotating API keys (via Cognito and API Gateway) etc but also backend logic that can be eventually deployed on AWS ApiGateway and AWS Lambda. Not only this but AMplify also provides a CICD pipeline and connects with Gothub.
In minutes, you can have a scalable service, with opetion to host frontend via AWS CloudFront, a global CDN service or via S3 hosting, deploy the API via ApiGateway and Lambda, have a CICD pipeline setup via AWS CodeDeploy and Code Build and also have user management via AWS Cognito. You can have multiple enviornments dev, test, beta etc and have it setup such that any push to the master branch is automatically deployed on the infra, and so on and so forth other branches being mapeed to specific enviornment. To top it all off, the same stack can be used to test and develop locally.
If you are rather tied down to use a specific service or function in a specific way, you can build up any of the combination of the above services. API Gateway for managing API, Cognito for user management, Lambda for compute capacity etc.
Rememebr, these are managed services so you offload a lot of engineering hours to AWS and being serverles means you are paying for what you use.
Comming to the example you have shared, you don't want your node process to be responsible of serving static assets - its a waste of the compute power as there is no intelligence attached to serving JS, CSS or images and also because in that case you introduce a new process in the loop. Instead have NGINX serve static assets itself. Refer this official guide or this StackOverflow answer.

How to execute below requests once ssh host logged through beanshall pre processor java script in Jmeter

I have connected ssh host trough beanshall pre processor java script, after that I have to execute couple(around 20 test cases) of http sampler requests in that same host.
Example:
Connected ssh 10.12.38.231:12 username and password
Logged above host using javascript Pre processor
Next i want to copule of http sampler in same host.
Am able to see logged into host in Jmeter console output
But those request running in my local machine not in host.
Is there any way to execute this scenario.
Thanks in advance!

If you want to connect to the remote machine over SSH and run the requests on that remote machine you have 2 options:
Transferring the JMeter test plan from the local machine to the remote one using i.e. SSH SFTP sampler
Installing JMeter onto that machine and kicking off the test in command-line non-GUI mode using SSH Command sampler
Both samplers can be installed as a part of SSH Protocol Support bundle using JMeter Plugins Manager
Also forget about Beanshell, since JMeter 3.1 you should be using JSR223 Test Elements and Groovy language for scripting.

How to create a nodejs websocket client

I'm working on a project where I need to have multiple node clients connect to a node server via websockets. The clients will send files to the server and the server will immediately distribute that file to all connected clients.
The problem I'm running into is connecting as a client in node. The built in ws module seems to only support server use. I've also tried the npm websocket client which allows me to use node as a client but I seem to only be able to send binary data without any other information like the filename, etc. using the sendBytes method.
Thanks for any suggestions.

Checkout the delivery package of npm.
It provides bi-directional file tranfer for node.js over socket.io.
https://www.npmjs.com/package/delivery

NodeRed Server: Install custom nodes while running

I run an NodeJS server with an website on Bluemix. In addition I use the embedded Node-Red module (http://nodered.org/docs/embedding.html) to run a Node-Red server in the background to use it on my website.
Now I want to add/update my custom nodes while the server runs.
Working Environment: Bluemix, Node.JS Express 4, Node-Red module
I would appreciate any help on this.

The Node-RED runtime includes an admin api that allows you to install nodes whilst the system is running.
See: http://nodered.org/docs/api/admin/methods/post/nodes/