Using authbind as an alternative may be preferable to setting capabilities. authbind is a system utility that allows users without superuser privileges to access privileged network services, including binding to privileged ports:
hobnob@hobnob:$ sudo apt install authbind
In contrast to setting capabilities, authbind allows more fine-grained control with regard to the port and permissions it is granting. Configuration files for authbind can be found at /etc/authbind. In short, if a user has permission to access the /etc/authbind/byport/<port> file, then that user is able to bind to that port:
hobnob@hobnob:$ sudo touch /etc/authbind/byport/80hobnob@hobnob:$ sudo chown hobnob /etc/authbind/byport/80hobnob@hobnob:$ sudo chmod ...
