Code snippet for docker blog post

gistfile1.sh

$ cat Dockerfile.base
FROM dockerfile/ubuntu
RUN apt-get update -y
CMD ENVNAME=<ENVNAME> runsomething

$ cat Dockerfile.debug
FROM iops/example:base
CMD something --debug

$ cat Dockerfile.release
FROM iops/example:base
CMD something

$ cat Makefile

buildbase:
    # Build docker container for base image
    cat Dockerfile.base > ./Dockerfile
    docker build -t iops/example:base .
    rm -f ./Dockerfile

builddebug: buildbase
    cat container/Dockerfile.debug > ./Dockerfile
    sed -i 's/<ENVNAME>/debug/g' ./Dockerfile
    docker build -t iops/example:dev .
    rm -f ./Dockerfile

buildrelease: buildbase
    cat container/Dockerfile.prod > ./Dockerfile
    sed -i 's/<ENVNAME>/release/g' ./Dockerfile
    docker build -t iops/example:release .
    rm -f ./Dockerfile