в общем вот, конфиг с кешированием чанков (по 5 сек)
# Disable nginx tokens
server_tokens off;

# Cache settings
proxy_cache_path "/ramcache" use_temp_path=off keys_zone=all:1m inactive=30s max_size=5g;
proxy_cache_min_uses 1;
#proxy_ignore_headers Cache-Control;

# HSTS (HTTP Strict-Transport-Security) (15768000 seconds = 6 months)
add_header Strict-Transport-Security max-age=15768000;
# Deny page rendering in <frame>, <iframe>, <embed> or <object>
add_header X-Frame-Options "DENY";
# Cross-Origin Read Blocking (CORB) protection
add_header X-Content-Type-Options nosniff;
# Cross-site scripting (XSS) protection
add_header X-XSS-Protection "1; mode=block";

# Allow only GET, POST, HEAD
add_header Allow "GET, POST, HEAD" always;

# Websocket proxy
map $http_upgrade $connection_upgrade {
 default upgrade;
 ''      close;
}

server {
 listen 80;
 server_name <server_name>;
 access_log off;

 open_file_cache max=1000 inactive=20s;
 open_file_cache_valid 30s;
 open_file_cache_errors off;

 keepalive_timeout…