# ============================================================
# Global Settings
# ============================================================

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

# ============================================================
# Events Block
# ============================================================
events {
    worker_connections  1024;
    use epoll;
    multi_accept on;
}

# ============================================================
# HTTP Block
# ============================================================
http {
    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;

    # Logging
    access_log  /var/log/nginx/access.log;
    error_log   /var/log/nginx/error.log warn;

    # Gzip Settings
    gzip on;
    gzip_disable "msie6";

    # ========================================================
    # Upstream Backend Servers
    # ========================================================
    upstream backend {
        server 127.0.0.1:8080 weight=5;
        server 127.0.0.1:8081;
        keepalive 32;
    }

    # ========================================================
    # Server Block
    # ========================================================
    server {
        listen 80 default_server;
        listen [::]:80 default_server;

        server_name example.com www.example.com;

        root /var/www/html;
        index index.html index.htm;

        # ====================================================
        # Location Blocks
        # ====================================================
        location / {
            try_files $uri $uri/ =404;
        }

        location /api/ {
            proxy_pass http://backend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location ~* \.(gif|jpg|jpeg|png|css|js|ico|svg)$ {
            expires 30d;
            add_header Cache-Control "public, no-transform";
        }

        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;

        location = /50x.html {
            root /var/www/html;
        }
    }
}