feat: add migrate database from a source to a target databse

fix: gpg encrypt permission warning message, update Kubernetes deployment example

cmd/migrate.go

@@ -0,0 +1,21 @@
+package cmd
+
+import (
+	"github.com/jkaninda/mysql-bkup/pkg"
+	"github.com/jkaninda/mysql-bkup/utils"
+	"github.com/spf13/cobra"
+)
+
+var MigrateCmd = &cobra.Command{
+	Use:   "migrate",
+	Short: "Migrate database from a source database to a target database",
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args) == 0 {
+			pkg.StartMigration(cmd)
+		} else {
+			utils.Fatal("Error, no argument required")
+
+		}
+
+	},
+}