Docker Compose method does not work out of box without change to Gemfile

[mwangdakota]

I could not get the page to build using the docker-compose method because of this issue:
https://stackoverflow.com/questions/9202324/execjs-could-not-find-a-javascript-runtime-but-execjs-and-therubyracer-are-in

I only could solve it by using the suggestion by stevec, modifying my Gemfile to:

FROM ruby:3.1.3

RUN apt-get update && \
  apt-get install --reinstall -y locales && \
  sed -i 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
  locale-gen en_US.UTF-8

ENV LANG en_US.UTF-8
ENV LANGUAGE en_US
ENV LC_ALL en_US.UTF-8

RUN mkdir -p /app

WORKDIR /app

COPY Gemfile /app
COPY Gemfile.lock /app

RUN apt-get update
RUN apt-get install nodejs -y
RUN gem install bundler:1.17.2
RUN bundle install

EXPOSE 4000

Unsure if this the right way to go about it, however.