Hi @Truong Hoang Phuc ,
Since you're using GitHub, you can take advantage of Actions to build and deploy your code to an app to an app service. This doc will walk you through how you can use the same Actions to build/deploy to a Kubernetes cluster. You didn't mention if your Node back is utilizing a microservices architecture. If not, I would advise simply deploying your Angular front and Node back to two separate app services hosted within the same plan. If your backend requires greater services, you can always move the app service to a separate and higher sku.