I'm on a Fedora 32 system.
Full config:
http_access allow all
coredump_dir /var/spool/squid3
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880
refresh_pattern . 0 20% 4320
access_log none
cache_store_log none
cache_log /dev/null
never_direct allow all
cache_peer zzz.nordvpn.com parent 89 3130 tls login=xXx:yYy
http_port 3129