My Ruby on Rails starter template. Use this to generate a new Rails app

Dockerfile.rails.boilerplate

FROM ruby:3.0

# Add nodejs to apt package manager
RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | bash -

# Install nodejs
RUN apt-get install -y nodejs

# Install Yarn
RUN npm install --global yarn

# Install rails and accompanying gems
RUN gem install rails

WORKDIR /app

# After the image is built run these next commands:
# docker run -v "$(pwd)"/.:/app --rm -it <app_name> rails new <app_name> .
#
# The new rails app is in the newly created subdirectory. Copy its contents where you please.

Recommended to put this in the parent directory and let this docker image build your rails app folder with contents