Dockerfile to deploy a RAILS application

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I just wanted to share a Dockerfile for deploying a RAILS application

# syntax=docker/dockerfile:1
FROM ruby:3.0
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
WORKDIR /myapp
COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock
RUN bundle install

COPY . .

EXPOSE 3000

# Configure the main process to run when running the image
CMD ["rails", "server", "-b", "0.0.0.0", "-p", "3000"]

Note: you can change the ruby version for the image.