create and push the docker image to Google Container Registry gcr.io

docker_push_gcr.sh

# add the Dockerfile

# build the docker
sudo docker build ./

# copy the docker image id <docker_image_id>

# run the docker image local on 8080
sudo docker run -p 8080:8080 [SOURCE_IMAGE]

# tag the docker image
sudo docker tag [SOURCE_IMAGE] gcr.io/[PROJECT_ID]/[IMAGE]

# run docker push
# FYI https://cloud.google.com/container-registry/docs/advanced-authentication#gcloud-helper
sudo docker push gcr.io/[PROJECT_ID]/[IMAGE]