Nginx config for connecting Grafana with InfluxDB (COSR settings problem) with cache (perf improvment)

nginx.conf

#user  nobody
worker_processes  4;

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

events {
	worker_connections  1024;
}

http {
    proxy_cache_path /data/nginx/cache keys_zone=mycache:20m max_size=1g inactive=60m;
    limit_conn_zone $server_name zone=perserver:10m;

    upstream backend {
        server host.docker.internal:8086;
        keepalive 50;
    }

    server {
        listen 8096;
        client_max_body_size 20m;
        location /query {
            proxy_cache mycache;
            proxy_cache_key "$host$request_uri";
            proxy_cache_min_uses 1;
            proxy_cache_methods GET;
            proxy_cache_valid 200 302 10m;
            proxy_cache_valid 404      1m;

            proxy_cache_background_update on;
            proxy_cache_revalidate on;
            proxy_cache_lock on;
            add_header X-Cache-Status $upstream_cache_status;
            proxy_ignore_headers Cache-Control;
            proxy_hide_header 'Access-Control-Allow-Origin';
            if ($http_origin = ''){
                set $http_origin "*";
            }

            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $http_origin;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'Pragma,Accept,Authorization,Content-Type,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
                add_header 'Access-Control-Max-Age' 1728000;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                add_header 'Access-Control-Allow-Credentials' 'true';
                return 204;
            }
            if ($request_method = 'GET') {
                add_header 'Access-Control-Allow-Origin' $http_origin;                
                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Credentials' 'true';
                add_header 'Access-Control-Allow-Headers' 'Pragma,Accept,Authorization,Content-Type,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
                #add_header 'Access-Control-Expose-Headers' 'Accept,Authorization,Content-Type,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
                proxy_pass http://backend;
            }
            if ($request_method = 'POST') {
                add_header 'Access-Control-Allow-Origin' $http_origin;
                add_header 'Access-Control-Allow-Credentials' 'true';
                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'Pragma,Accept,Authorization,Content-Type,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
                proxy_pass http://backend;
            }
        }
        location / {
            proxy_pass http://backend;
        }
    }
}