Hi all.  I'm trying to setup an instance of Odoo 13 on AWS that uses an RDS postgresql back-end.  My goal is to have just the Odoo application server running on an EC2 instance without a postgresql server installed.  Any time I run through the repository installation instructions but skip the postgresql server install step, however, I get missing dependency errors.  If I install the application deb package and then try to uninstall postgresql, it uninstalls Odoo.  This is happening on Ubuntu 20.04.

I am very new to Odoo and I'm, admittedly, not the strongest Linux user, so I am dependent on step-by-step instructions and guides at this point.  None of my searches have resulted in a guide detailing how to do an Odoo install without postgresql.

Any help is much appreciated!