Only run default command if no args

Add custom template (Frameworks)

cmd/frameworks/bootstrap4default/main.go

@@ -0,0 +1,17 @@
+// +build frameworkbootstrap4
+
+package bootstrap4
+
+import (
+	"github.com/gobuffalo/packr"
+	"github.com/wailsapp/wails/frameworks"
+)
+
+func init() {
+	assets := packr.NewBox("./assets")
+	frameworks.FrameworkToUse = &frameworks.Framework{
+		Name: "Bootstrap 4",
+		JS:   assets.String("bootstrap.bundle.min.js"),
+		CSS:  assets.String("bootstrap.min.css"),
+	}
+}