support docker images from docker registry

[j143]

https://github.com/moby/docker-image-spec/blob/main/spec.md

[j143]

0907f26

after this I'm at this stage. let fix this:

$ ./basic-docker run hello:latest
Environment detected: inContainer=true, hasNamespacePrivileges=true, hasCgroupAccess=false
Starting container container-1744544641
App layer created with ID: app-layer-container-1744544641
Metadata for layer app-layer-container-1744544641 saved to /tmp/basic-docker/layers/app-layer-container-1744544641.json
Error: failed to apply layer base-layer: lstat /tmp/basic-docker/layers/base-layer/bin: permission denied
@j143 ➜ /workspaces/basic-docker-engine (main) $ sudo ./basic-docker run hello:latest
Environment detected: inContainer=true, hasNamespacePrivileges=true, hasCgroupAccess=false
Starting container container-1744544646
App layer created with ID: app-layer-container-1744544646
Metadata for layer app-layer-container-1744544646 saved to /tmp/basic-docker/layers/app-layer-container-1744544646.json
Debug: Writing PID file for container container-1744544646 at /tmp/basic-docker/containers/container-1744544646/pid
Debug: Current process PID is 25320
No command provided. Keeping the container process alive.
fatal error: all goroutines are asleep - deadlock!

goroutine 1 [select (no cases)]:
main.run()
        /workspaces/basic-docker-engine/main.go:225 +0xa9e
main.main()
        /workspaces/basic-docker-engine/main.go:112 +0xf6