ubuntu not found

[nessor]

The resource

FROM dockerfile/ubuntu

in the dockerfile is not found:

sudo docker build -t="dockerfile/ubuntu-desktop" github.com/dockerfile/ubuntu-desktop Sending build context to Docker daemon 100.4 kB Sending build context to Docker daemon Step 0 : FROM dockerfile/ubuntu Pulling repository dockerfile/ubuntu INFO[0004] Error: image dockerfile/ubuntu:latest not found

[aiportal]

docker build -t="dockerfile/ubuntu" github.com/dockerfile/ubuntu

then

docker build -t="dockerfile/ubuntu-desktop" github.com/dockerfile/ubuntu-desktop