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Windows 10 : Failed on Building and tagging docker image

I follow the tutorials and run the the docker build command that creates a Docker image using the Dockerfile. This built image is in my machine’s local Docker image registry.

cd doodle\cheers2019 ;

docker build -t larry01686856pccw/cheers2019 .

When I set up the proxy server and execute, it gives the following Internet connection and firewall issues. Would you please tell we what to do next ?