Монтаж на docker посочете файла docker

docker build -t [tag] .

FROM ubuntu:18.04
COPY . /app
RUN make /app
CMD python /app/app.py

cat DockerFile.debian.foo | docker build -t debian.foo -

$ docker build - < Dockerfile

RUN cd /
    git clone https://github.com/
    cd /fileadmin/
    bundle install
    rake db:migrate
    bundle exec rails runner "eval(File.read 'createTestUser.rb')"
    mkdir /pending
    mkdir /live
    chmod 777 /pending
    chmod 777 /live

docker build -t [name] -f [Dockerfile]