This is the long awaited small POSIX shell script that installs Debian
packages needed to run Odoo.

At the first time it was intended to be a small Perl script as Perl is
available everywhere. Finally it turned out that a POSIX shell script is
smaller, easier to read and could be run everywhere.

closes odoo/odoo#92038

Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>