Serve embedded admin assets from root

pets-be/internal/admin/embed_test.go

@@ -1,6 +1,7 @@
 package admin
 
 import (
+	"io/fs"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -16,6 +17,20 @@ func TestAdminAtRootAndAPIRoutes(t *testing.T) {
 	r := gin.New()
 	httpapi.New(nil, nil, &config.Config{}).Register(r)
 	Register(r)
+	assets, err := fs.ReadDir(distFS, "dist/assets")
+	if err != nil {
+		t.Fatal(err)
+	}
+	var script string
+	for _, asset := range assets {
+		if strings.HasSuffix(asset.Name(), ".js") {
+			script = "/assets/" + asset.Name()
+			break
+		}
+	}
+	if script == "" {
+		t.Fatal("admin bundle has no JavaScript asset")
+	}
 
 	for _, tc := range []struct {
 		path   string
@@ -23,6 +38,8 @@ func TestAdminAtRootAndAPIRoutes(t *testing.T) {
 		body   string
 	}{
 		{path: "/", status: http.StatusOK, body: "<div id=\"root\"></div>"},
+		{path: script, status: http.StatusOK},
+		{path: "/favicon.svg", status: http.StatusOK},
 		{path: "/api/ping", status: http.StatusOK, body: "pong"},
 		{path: "/api/missing", status: http.StatusNotFound},
 		{path: "/assets/missing.js", status: http.StatusNotFound},