In the root folder of your Angular app add three files:
Dockerfile is a multistage build. STAGE 1 builds our angular application.
STAGE 2 copies from STAGE 1 our built angular app and copies the files into what is going to be our running container.
The reason for doing multistage builds is to avoid having all unnecessary files within our docker container, such as build dependencies, build tools, extra files, ..., making our image as small as possible.
Run the build in the root folder of your app:
docker build -t myappname:latest .
Testing the containerized docker image
Simply run the docker container and go to: http://localhost