I would like to to make Odoo read the `admin_passwd` form a file existing on the file system.

My use case is this: 
I am running an `odoo:10.0` container instance on a Docker swarm-mode cluster and would like to share the necessary credentials using [docker secrets]. 
For instance, `admin_passwd` would be found at `/run/secrets/admin_passwd`... etc.

Is this type of configuration supported in Odoo? 
If not, please put some spot lights on what may help me extend Odoo and develop such a module.

Thanks in advance!

[docker secrets]: https://docs.docker.com/engine/swarm/secrets/