nginx configuration file for node.js app

nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #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  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;
    client_max_body_size 100m;

    #keepalive_timeout  0;
    keepalive_timeout  65;
    
    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    server {
        listen       4200;
        server_name  localhost;

        location / {
            root      /dist;
            try_files $uri $uri/ /index.html =404;
        }

        location /api {               
        	rewrite ^\/api(.*)$ $1 break;
          
            # requests to the API will be proxy_pass to the backend API infra
            # read this -> http://en.wikipedia.org/wiki/X-Forwarded-For
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
            
            # pass the host header from the client to help with redirects 
            proxy_set_header Host $http_host;           
            
            # stops nginx from doing something silly
            proxy_redirect off;                                
            
            # proxy_pass to backend API
            proxy_pass http://localhost:9901;          
            
            # send the IP address and remote server address for secuirty 
            proxy_set_header X-Real-IP $remote_addr;
        }

		gzip on;
		gzip_disable "msie6";

		gzip_vary on;
		gzip_proxied any;
		gzip_comp_level 6;
		gzip_buffers 16 8k;
		gzip_http_version 1.1;
		gzip_types 
		  application/atom+xml
		  application/javascript
		  application/json
		  application/ld+json
		  application/manifest+json
		  application/rss+xml
		  application/geo+json
		  application/vnd.ms-fontobject
		  application/x-web-app-manifest+json
		  application/xhtml+xml
		  application/xml
		  application/rdf+xml
		  font/otf
		  application/wasm
		  image/bmp
		  image/svg+xml
		  text/cache-manifest
		  text/css
		  text/javascript
		  text/plain
		  text/markdown
		  text/vcard
		  text/calendar
		  text/vnd.rim.location.xloc
		  text/vtt
		  text/x-component
		  text/x-cross-domain-policy;
		gzip_min_length 256;

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

    include servers/*;
}