cmd/pkgserver/ui_test: add DOM reporter

cmd/pkgserver/test_ui.go

@@ -2,4 +2,26 @@
 
 package main
 
+import (
+	"embed"
+	"io/fs"
+	"net/http"
+)
+
 //go:generate tsc --outDir ui_test/static -p ui_test
+//go:generate sass ui_test/lib/ui.scss ui_test/static/style.css
+//go:generate cp ui_test/lib/ui.html ui_test/static/index.html
+//go:embed ui_test/static
+var _staticTest embed.FS
+
+var staticTest = func() fs.FS {
+	if f, err := fs.Sub(_staticTest, "ui_test/static"); err != nil {
+		panic(err)
+	} else {
+		return f
+	}
+}()
+
+func testUIRoutes(mux *http.ServeMux) {
+	mux.Handle("GET /test/", http.StripPrefix("/test", http.FileServer(http.FS(staticTest))))
+}