docker: “build” requires 1 argument. See 'docker build --help'

Question

Trying to follow the instructions for building a docker image from the docker website.

https://docs.docker.com/examples/running_redis_service/

this is the er

Answer 1

The following command worked for me. Docker file was placed in my-app-master folder.

docker build -f my-app-master/Dockerfile -t my-app-master .