docker-compose

centos-docker

FROM centos:7
RUN curl -o /etc/yum.repos.d/hashicorp repo http://rpm.releases.hashicorp.com/RHEL/hashicorp.repo

RUN mkdir /var/linux-build-info/
RUN touch /var/linux-build-info/newfile.txt

COPY do-stuff /

CMD /do-stuff

do-stuff

#!/usr/bin/env bash

set -Eeuo pipefail

FILE=/var/linux-build-info/newfile.txt

echo "SOME TEXT HERE" >> "$FILE"

echo "==> File contents:"
cat "$FILE"

docker-compose.yml

services:
  centos:
    build:
      context: .
      dockerfile: centos-docker
    volumes:
      - linux-build-info:/var/linux-build-info/
volumes:
  linux-build-info:
    driver: local