Я пытаюсь создать образ докера, используя приложение ruby, используя файл докера:
FROM jruby:latest
# Install apt based dependencies required to run Rails as
# well as RubyGems. As the Ruby image itself is based on a
# Debian image, we use apt-get to install those.
RUN apt-get update && apt-get install -y \
build-essential \
nodejs \
git \
ruby-dev \
gcc \
libffi-dev \
make \
zlib1g-dev \
libssl-dev \
libreadline6-dev \
libyaml-dev
# Configure the main working directory. This is the base
# directory used in any further RUN, COPY, and ENTRYPOINT
# commands.
RUN mkdir -p /app
WORKDIR /app
# Copy the Gemfile as well as the Gemfile.lock and install
# the RubyGems. This is a separate step so the dependencies
# will be cached unless changes to one of those two files
# are made.
COPY Gemfile Gemfile.lock ./
RUN gem install bundler && bundle install --jobs 20 --retry 5
# Copy the main application.
COPY . ./
# Expose port 3000 to the Docker host, so we can access it
# from the outside.
EXPOSE 3000
, но я получаю сообщение об ошибке, когда пытаюсь создать этот образ докера
gem install RedCloth
выдает ошибку, говорящую о том, что мне сначала нужно установить инструменты разработки.
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /usr/local/bundle/gems/RedCloth-4.3.2/ext/redcloth_scan
/opt/jruby/bin/jruby -r ./siteconf20181127-31-1zsapr.rb extconf.rb
checking for main() in -lc... RuntimeError: The compiler failed to generate an
executable file.
You have to install development tools first.
Как это исправить?