Containerized Ruby on Rails 7 Bootstrap/Development Environment

Dockerfile

# Dockerfile for a containerized development environment
# for the railstutorial.org Rails tutorial
# ASSUMPTION: source is volume mounted
# docker build --no-cache -t railsgen .
# docker run -it --rm -v $(pwd):/app -p 3000:3000 railsgen
# bundle exec bin/rails server -p 3000 -b 0.0.0.0
FROM ruby:3.1.2-slim-bullseye

ARG BUNDLER_VER=2.3.14
ARG RAILS_VER=7.0.4

# Install Build Packages, Bundler, and rails
ARG BUILD_PACKAGES='build-essential libpq-dev libsqlite3-dev'
RUN apt-get update \
  && apt-get -y dist-upgrade \
  && apt-get -y install ${BUILD_PACKAGES} \
  && rm -rf /var/lib/apt/lists/* \
  # install bundler and rails versions
  && gem install bundler:$BUNDLER_VER rails:$RAILS_VER

# --- Dev Environment ---
WORKDIR /app

# Add git, vim, and curl at least
ARG DEVENV_PACKAGES='git vim curl'
RUN apt-get update \
  && apt-get dist-upgrade \
  && apt-get install -y ${DEVENV_PACKAGES} \
  && rm -rf /var/lib/apt/lists/*

# Start devenv in (command line) shell
CMD bash