Repositories configuration

Most of servers may use same repositories set:

deb http://deb.debian.org/debian/ trixie main contrib non-free non-free-firmware
deb http://deb.debian.org/debian/ trixie-updates main contrib non-free non-free-firmware
deb http://deb.debian.org/debian/ trixie-backports main contrib non-free non-free-firmware
deb http://security.debian.org/debian-security trixie-security main contrib non-free non-free-firmware

deb https://deb.yeti-switch.org/debian/1.14 trixie main
deb https://apt.postgresql.org/pub/repos/apt/ trixie-pgdg main

System repositories can be changed in /etc/apt/sources.list. Since use our own package repository you have add our key to trusted:

# wget https://deb.yeti-switch.org/yeti.gpg -O /etc/apt/trusted.gpg.d/yeti-key.asc

PGDG repository key also should be added to trusted list

# wget https://www.postgresql.org/media/keys/ACCC4CF8.asc -O /etc/apt/trusted.gpg.d/pgdg-key.asc