nginx configuration that escape the request body and logging important information

nginx.conf

user  nginx;
worker_processes 1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  10000;
}
worker_rlimit_nofile 40000;

http {
    log_format  main  escape=json '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" '
                      '"$request_body"';

    access_log  /var/log/nginx/access.log  main;

    keepalive_timeout  65;
    keepalive_requests 10000;
    client_max_body_size 20M;

    include /etc/nginx/conf.d/*.conf;
}