Improve ergonomics by using arguments instead of flags

[Snehil-Shah]

Problem

The command ServePort check-port -p 8080 doesn't need a flag to specify the port, it leads to bad design.
Simply using ServePort check-port 8080 makes up for a more natural and instinctive approach, as it's already stating the obvious without the use of flags.

In general we should be reserving flags as a means for configuring and altering the behavior of a command and use arguments for the obvious inputs it needs.

Outcome

Scout the current design to look for places where this improvement makes sense.