nginx.conf with proxy configuration and proxy caching configuration. It also logs the status of cache if there was a cache hit or cache miss in the host.access.log

nginx.conf

worker_processes  1;

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" $upstream_cache_status  [$time_local]' ;

    access_log  logs/access.log  main;

    keepalive_timeout  65;
 
    proxy_cache_path /temp/cache keys_zone=mycache:10m;

    server {
        listen       80;
        server_name  localhost;

        access_log  logs/host.access.log  main;

        proxy_cache mycache;
  
        location / {
            proxy_pass http://example.com/;
            # Calculating the cache key
            proxy_cache_key "$host$request_uri$cookie_user";
            # Cache the responses to requests with methods
            proxy_cache_methods GET HEAD POST;
            # Reponses with status codes 200 and 206 are cached for 1 hour.
            proxy_cache_valid 200 206 1h;
        }

        #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;
        }

    }

}