user www-data;
worker_processes 1;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
	worker_connections 768;
}

http {
	##
	# Basic Settings
	##
	sendfile on;

	keepalive_timeout 65;
	types_hash_max_size 2048;
	
        include /etc/nginx/mime.types;
	default_type application/octet-stream;

	##
	# Logging Settings
	##

	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log;
	
	##
	# Virtual Host Configs
	##

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;
}

server {
        listen 80;
        access_log /var/log/nginx/suok.access.log;
        error_log /var/log/nginx/suok.error.log;

    proxy_send_timeout    600;
    proxy_connect_timeout    600;
    proxy_read_timeout    600;
    send_timeout        600;


    location / {
        gzip_static on;
        index   index.html;
        root /usr/share/nginx/html;
        try_files $uri $uri/ @index;
    }

    location @index {
        root /usr/share/nginx/html;
        add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
        expires -1;
        try_files /index.html =404;
    }

    location /api/ {
        proxy_pass http://127.0.0.1:8080/api/;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
	
	location /j_spring_security_check {
        proxy_pass http://127.0.0.1:8080/j_spring_security_check;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
	
	location /logout {
        proxy_pass http://127.0.0.1:8080/logout;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

}

curl -X POST "http://127.0.0.1:8080/j_spring_security_check" -F "username=administrator" -F "password=1"  -v
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 8080 (#0)
> POST /j_spring_security_check HTTP/1.1
> Host: 127.0.0.1:8080
> User-Agent: curl/7.58.0
> Accept: */*
> Content-Length: 254
> Content-Type: multipart/form-data; boundary=------------------------8c545fb8770f70e2
> 
< HTTP/1.1 200 OK
< Date: Fri, 25 Oct 2019 14:27:40 GMT
< Set-Cookie: JSESSIONID=node01rg6yex3rw6hk1eo7oalu5ztab7.node0;Path=/
< Expires: Thu, 01 Jan 1970 00:00:00 GMT
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< X-Frame-Options: DENY
< Content-Length: 0
< 
* Connection #0 to host 127.0.0.1 left intact

getsebool httpd_can_network_connect