knotserver/internal: setup pprof

cmd/knotserver/main.go

···
 	"github.com/sotangled/tangled/knotserver/db"
 	"github.com/sotangled/tangled/log"
 	"github.com/sotangled/tangled/rbac"
+
+	_ "net/http/pprof"
 )
 
 func main() {

knotserver/internal.go

···
 	"net/http"
 
 	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
 	"github.com/sotangled/tangled/knotserver/db"
 	"github.com/sotangled/tangled/rbac"
 )
···
 
 	r.Get("/push-allowed", h.PushAllowed)
 	r.Get("/keys", h.InternalKeys)
+	r.Mount("/debug", middleware.Profiler())
 
 	return r
 }