ansible-roles
.ssh/config
avoid host key checking on test machines.
roles
each role has same host configuration file to start with.
mariadb
'configure first' and install mariadb server 10.x.
nodejs
install and configure nodejs with selected npm packages on Debian servers.
wkhtmltox
install and configure whtmltopdf on Debian servers using .deb or .tar packages with specific versions when needed (especially with odoo)