Deploy node js express application - cent os - node.js

Question

I am trying to deploy a node js application on GoDaddy VPS hosting.
I have uploaded all the files to the server and started the server using pm2
following This Tutorial
My server is running on port 3021 which I want to run on port 80
for a particular domain.
I have completed steps till pm2 in the tutorial but from Nginx part, I cannot understand what to do next.
I have installed Nginx then running this command sudo vi /etc/nginx/sites-available/default
and adding configurations and when I am saving it an error shows [ Error writing /etc/nginx/sites-available/default: No such file or directory ]
I am running apache in the server. Is it possible to do the same using apache??
Edit
Here is my nginx config::
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
include /etc/nginx/conf.d/*.conf;
}

Answer 1

So if you have pm2 running then you are half way through :) About nginx conf. This command: sudo vi /etc/nginx/sites-available/default probably does not work because the sites-available directory does not exist. Keep in mind that sites-available and sites-enabled are not required by nginx. It's just a good practice to have each server config in a separate file. But nginx will work without them too. If you are not planning to add any more servers, just use the /etc/nginx/nginx.conf file to configure your server. What you need to do is to create a new server block with desired configuration, e.x:
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name yourapp.com www.yourapp.com;
root /var/www/html; # <- for you it can be any other dir
index index.html index.htm # <- or any other file which is your main file
# You want to proxy_pass the traffic on any route to your internal app
location ~ /(.*) { # ~ means that you are using regex
proxy_pass http://localhost:3021/$1$is_args$args; # <- proxy_pass to your internal app
proxy_redirect off;
proxy_read_timeout 60s;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
}
}
Just place the above config into /etc/nginx/nginx.conf inside http block.
Now check your nginx config:
nginx -t
If it's successful, your nginx config is done.
It's not over yet. One more thing to do- open port 80 in the firewall, like so:
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --reload
You can check if it's open:
firewall-cmd --list-ports
Open your browser at http://yourapp.com/ and see if it works.
Remember to keep an eye on nginx and your app's logs:
tail -f /var/logs/nginx/access.log # or error.log to see nginx access/error log
pm2 logs # to see your app logs
Hope it helps. Do not hesitate to share more info if you encounter any more problems

Answer 2

Try to use /etc/nginx/conf.d/default.conf instead of /etc/nginx/sites-available/default to add your configuration. According to your config it should be the correct path to configure your server.
If you want to use /etc/nginx/sites-available/defaultyou should add include /etc/nginx/sites-available/*; to your nginx.conf.
http {
...
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-available/*;
}