artifacts.elastic.co (Elasticsearch)

wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg
apt install apt-transport-https
echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/9.x/apt stable main" | tee /etc/apt/sources.list.d/elastic-9.x.list
apt update
apt install elasticsearch

from https://www.elastic.co/docs/deploy-manage/deploy/self-managed/install-elasticsearch-with-debian-package