config.json

{
  "error_log": "/dev/fd/2",
  "pid": "/var/run/nginx.pid",
  "user": "nginx",
  "worker_processes": "auto",
  "worker_rlimit_nofile": "100000",
  "events": {
    "multi_accept": "on",
    "use": "epoll",
    "worker_connections": "8192"
  },
  "http": {
    "access_log": "/dev/fd/1",
    "default_type": "application/octet-stream",
    "gzip": "on",
    "gzip_buffers": "16 8k",
    "gzip_comp_level": "4",
    "gzip_proxied": "off",
    "gzip_types": "application/json",
    "gzip_vary": "on",
    "include": "/etc/nginx/mime.types",
    "index": "index.html index.htm",
    "keepalive_timeout": "120",
    "proxy_cache_path": "/var/cache/nginx levels=1:2 keys_zone=one:8m max_size=3000m inactive=600m",
    "proxy_temp_path": "/var/tmp",
    "sendfile": "on",
    "server_tokens": "off",
    "tcp_nopush": "on",
    "server": {
      "httpd": {
        "listen": "80",
        "server_name": "apache.sample.com",
        "charset": "utf-8",
        "location": {
            "image": {
                "expression": "^/image",
                "proxy_pass": "http://httpd/",
                "proxy_set_header": "{\"X-Real-IP\": \"$remote_addr\", \"X-Forwarded-For\": \"$proxy_add_x_forwarded_for\", \"X-Forwarded-Proto\": \"$scheme\", \"Host\": \"$host\"}",
                "if": "{\"$request_method = POST\": \"return 403\"}"
            }
        },
        "upstream": {
          "keepalive": "64"
        }
      },
      "nginx": {
        "listen": "80",
        "server_name": "nginx.sample.com"
      }
    }
  }
}