Deploying Simple NON Phoenix apps on VPS ( linode / Digital ocean) with Git

Deploying NON Phoenix apps

#-- Follow this great writeup for prerequisites- having erlang/elixir/gitinstalled.
#-- Setting up repos on the vps etc.
#-- http://gabrieljaldon.com/articles/deploying-phoenix-with-git.html
# In my case - I'M NOT USING PHOENIX I had to modified the post-receive hook in the repo
#-------- post-receive hook

#!/bin/bash
git --work-tree=/<your>/<path>/<toyour.app> --git-dir=/<your>/<path>/<toyour.REPO> checkout -f;
cd /<your>/<path>/<toyour.app>

function restart {
  PORT=8888 mix do deps.get, deps.compile && MIX_ENV=prod PORT=$1 elixir --detached -S mix run --no-halt
}
  # Find previous running process
previous_port=$(lsof -t -i:4090)
if [ -n $previous_port ]; then
  kill $previous_port;
  restart 4090
else
  restart 4090
fi

sleep 2 # not sure if needed
previous_port=$(lsof -t -i:4092)
if [ -n $previous_port ]; then
  kill $previous_port;
  restart 4092
else
  restart 4092
fi

#---- END post-receive hook
#---- MY NGINX CONFIG. NGINX >= 1.4

upstream YOURNAME {
  server 127.0.0.1:4090;
  server 127.0.0.1:4092;
}

server {
	listen 80;
	root /<your>/<path>/<toyour.app>;
	server_name example.com www.example.com;
        try_files $uri/index.html $uri @YOURNAME;
	
	location / { 
         proxy_pass http://YOURNAME; 
         proxy_set_header Host $host; 
         # WebSocket support (nginx 1.4) 
         proxy_http_version 1.1; 
         proxy_set_header X-Forwarded-For $remote_addr; 
         proxy_set_header Upgrade $http_upgrade; 
         proxy_set_header Connection "upgrade"; 
 	}
        
	error_page 500 502 503 504 /500.html;
        access_log  /var/log/nginx/access.log;
        error_log  /var/log/nginx/error.log;
}