Support redirect server without ingress

[travisgroth]

Is your feature request related to a problem? Please describe.

Pomerium itself supports redirecting traffic from 80->443, but the current kubernetes service configuration does not expose that functionality.

When using an ingress in front of pomerium, this is typically handled by an ingress controller annotation.

Describe the solution you'd like

An option to enable this feature either automatically based on values, or explicitly through an additional option.

At a minimum we should probably expose port 80 on the proxy even if we're in secure mode.

Describe alternatives you've considered

n/a

Explain any additional use-cases

n/a

Additional context

n/a