There is a missing hypen in the documentation:
`docker build < Dockerfile` will complain
`docker build - < Dockerfile` will not complain
Upstream-commit: 5e6cd21f8b3bded9e9cba2e1b9a754df5a9c2bf2
Component: engine
There is a missing hypen in the documentation:
`docker build < Dockerfile` will complain
`docker build - < Dockerfile` will not complain
Upstream-commit: 5e6cd21f8b3bded9e9cba2e1b9a754df5a9c2bf2
Component: engine