There always report errors when build service "smartkg"

[v3551G]

It can be seen from the Docker-compose file that the application contains three services, namely aspnetcore, smartkg, and ui. When I execute "sudo docker-compose build --build-arg DOCKER_HOST=${docker_host_ip}" , there always report errors about smartkg as follows,
=> ERROR [smartkg internal] load metadata for docker.io/library/aspnetcore:latest 48.0s
failed to solve: DeadlineExceeded: DeadlineExceeded: DeadlineExceeded: aspnetcore: failed to do request: Head "https://registry.docker-cn.com/v2/library/aspnetcore/manifests/latest?ns=docker.io": dial tcp 106.14.52.175:443: i/o timeout

It seems that the image 'docker.io/library/aspnetcore:latest' can not be accessed,

Can you help me fix this issue?

[binarychen]

You'd better replace ${docker_host_ip} to your own server IP.
Meanwhile, you need a docker account. Then use it in docker login.
Otherwise, you will get error for "ERROR: Service 'aspnetcore' failed to build: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit
"