FROM alpine:3.8
RUN my_repo = "http://myrepo.git" && cd /tmp && git clone $my_repo
$ docker run -v $(pwd):/project:ro --workdir=/project --rm -i hadolint/hadolint:latest-debian hadolint /project/Dockerfile
/project/Dockerfile:3 SC1068 Don't put spaces around the = in assignments.
/project/Dockerfile:3 DL3003 Use WORKDIR to switch to a directory