Improve console message in case no k8s connection possible

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"github.com/joomcode/errorx"
 	"os"
 	"os/signal"
 	"strings"
@@ -73,7 +74,13 @@ func main() {
 
 	address, webServerDone, err := server.StartServer(ctx, cancel)
 	if err != nil {
-		log.Fatalf("Failed to start Helm Dashboard: %+v", err)
+		if errorx.IsOfType(err, errorx.InitializationFailed) {
+			log.Debugf("Full error: %+v", err)
+			log.Errorf("No Kubernetes cluster connection possible. Make sure you have valid kubeconfig file or run dashboard from inside cluster. See https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/")
+			os.Exit(1)
+		} else {
+			log.Fatalf("Failed to start Helm Dashboard: %+v", err)
+		}
 	}
 
 	if !opts.NoTracking {

pkg/dashboard/server.go

@@ -46,7 +46,7 @@ func (s *Server) StartServer(ctx context.Context, cancel context.CancelFunc) (st
 
 	err = s.detectClusterMode(data)
 	if err != nil {
-		return "", nil, err
+		return "", nil, errorx.Decorate(err, "Failed to detect cluster mode")
 	}
 
 	go checkUpgrade(data.StatusInfo)
@@ -80,7 +80,7 @@ func (s *Server) detectClusterMode(data *objects.DataLayer) error {
 		}
 		ns, err := app.K8s.GetNameSpaces()
 		if err != nil { // no point in continuing without kubectl context and k8s connection
-			return err
+			return errorx.InitializationFailed.Wrap(err, "No k8s cluster connection")
 		}
 		log.Debugf("Got %d namespaces listed", len(ns.Items))
 		data.StatusInfo.ClusterMode = true