Frontend service: Ensure we set Cache-Control header in the response (#113152)

ensure we set Cache-Control header in the response from frontend-service

pkg/services/frontend/index.go

@@ -153,6 +153,7 @@ func (p *IndexProvider) HandleRequest(writer http.ResponseWriter, request *http.
 	p.runIndexDataHooks(reqCtx, &data)
 
 	writer.Header().Set("Content-Type", "text/html; charset=UTF-8")
+	writer.Header().Set("Cache-Control", "no-store")
 	writer.WriteHeader(200)
 	if err := p.index.Execute(writer, &data); err != nil {
 		if errors.Is(err, syscall.EPIPE) { // Client has stopped listening.

pkg/services/frontend/index_test.go

@@ -92,6 +92,7 @@ func TestFrontendService_WebAssets(t *testing.T) {
 
 		assert.Equal(t, 200, recorder.Code)
 		assert.Contains(t, recorder.Header().Get("Content-Type"), "text/html")
+		assert.Contains(t, recorder.Header().Get("Cache-Control"), "no-store")
 
 		// The response should contain references to the assets
 		body := recorder.Body.String()