Add health (healthz) endpoint (Feature Request)

[brianramseyau]

I'm currently trying to get this going in a helm chart for my use case, and it's considered best practise to have a health check endpoint in Kubernetes for readiness/liveness

Ideally, it would have a blank 200 code return for the HTTP path of /healthz.

I really don't know much about go, but my assumption after a quick google is adding the below (or similar) to this file: internal/http/http.go

Such as:

  e.GET("/healthz", func(c echo.Context) error {
	  return c.String(http.StatusOK, "Ok")
  })