Upload
You can upload a Dockerfile or a tar archive containing a Dockerfile from your computer. When using an tarball, the root folder will be used as the build context.
Indicate the path to the Dockerfile within the tarball.
URL
Specify the URL to a Dockerfile, a tarball or a public Git repository (suffixed by .git). When using a tarball or a Git repository URL, the root folder will be used as the build context.
Indicate the path to the Dockerfile within the tarball/repository (ignored when using a Dockerfile).