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user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
worker_connections 768;
# multi_accept on;
}

http {

##
# Basic Settings
##

sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;

# server_names_hash_bucket_size 64;
# server_name_in_redirect off;

include /etc/nginx/mime.types;
default_type application/octet-stream;

##
# SSL Settings
##

ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;

##
# Logging Settings
##

access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;

##
# Gzip Settings
##

gzip on;

# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

##
# Virtual Host Configs
##

include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;

proxy_cache_path /var/www/cache keys_zone=mycache:10m inactive=23h loader_threshold=300 loader_files=4096 max_size=4g;
server {
        listen 80;
        proxy_cache mycache;

        location / {
            proxy_pass http://<jellyfin_server_domain>:8096;
        }

        location /web {
            proxy_pass http://<jellyfin_server_domain>:8096;
            proxy_cache_valid any 1m;
            proxy_cache_min_uses 3;
            proxy_cache_bypass $cookie_nocache $arg_nocache$arg_comment;
        }

location /socket {
        # Proxy Jellyfin Websockets traffic
        proxy_pass http://<jellyfin_server_domain>:8096;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Protocol $scheme;
        proxy_set_header X-Forwarded-Host $http_host;
    }
    }
}

#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
# 
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
# 
# server {
# listen     localhost:110;
# protocol   pop3;
# proxy      on;
# }
# 
# server {
# listen     localhost:143;
# protocol   imap;
# proxy      on;
# }
#}

Src:
https://www.peterbe.com/plog/how-i-simulate-a-cdn-with-nginx
https://docs.nginx.com/nginx/admin-guide/content-cache/content-caching/
https://www.oodlestechnologies.com/dev-blog/creating-custom-cache-server-nginx/
https://dev.to/janreges/how-to-build-a-cdn-23-server-and-reverse-proxy-configuration-16md