docker-compose.yml

version: '3'
services:
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    ports:
     - "5000:3000"
    volumes:
      - .:/usr/src/app

Dockerfile

FROM ruby:2.4

# Versions: https://pypi.python.org/pypi/awscli#downloads
ENV AWS_CLI_VERSION 1.11.178


RUN apt-get update && \
    apt-get install -y --no-install-recommends \
      python-dev build-essential groff less && \
    curl -o /tmp/get-pip.py https://bootstrap.pypa.io/get-pip.py && \
    python /tmp/get-pip.py && \
    pip --no-cache-dir install awscli==${AWS_CLI_VERSION} && \
    rm -rf /var/lib/apt/lists/*