Add default ruby images (#19)

images/ruby/Dockerfile.centos

@@ -0,0 +1,17 @@
+FROM codercom/enterprise-base:centos
+
+# Run everything as root
+USER root
+
+# Install OpenSSL library
+RUN yum install -y openssl-devel
+
+# Install Ruby from source
+COPY ./install-ruby.sh /tmp
+RUN chmod +x /tmp/install-ruby.sh && /tmp/install-ruby.sh
+
+# Install bundler gem
+RUN gem install bundler
+
+# Set back to coder user
+USER coder

images/ruby/Dockerfile.ubuntu

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+FROM codercom/enterprise-base:ubuntu
+
+# Run everything as root
+USER root
+
+# Install OpenSSL library
+RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y libssl-dev
+
+# Install Ruby from source
+COPY ./install-ruby.sh /tmp
+RUN chmod +x /tmp/install-ruby.sh && /tmp/install-ruby.sh
+
+# Set back to coder user
+USER coder

images/ruby/install-ruby.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+RUBY_MAJOR=2.7
+RUBY_VERSION=2.7.2
+RUBY_SHA256=6e5706d0d4ee4e1e2f883db9d768586b4d06567debea353c796ec45e8321c3d4
+RUBY_DOWNLOAD_PATH=/tmp/ruby.tar.gz
+RUBY_SOURCE_DIR=/tmp/ruby-${RUBY_VERSION}
+
+echo "Downloading Ruby ${RUBY_VERSION}..."
+curl -fsSL -o ${RUBY_DOWNLOAD_PATH} https://cache.ruby-lang.org/pub/ruby/${RUBY_MAJOR}/ruby-${RUBY_VERSION}.tar.gz
+
+echo "Comparing downloaded file hash..."
+echo "${RUBY_SHA256}  ${RUBY_DOWNLOAD_PATH}" | sha256sum -c -
+
+echo "Unzipping Ruby..."
+tar -xzf $RUBY_DOWNLOAD_PATH -C /tmp
+
+echo "Installing Ruby..."
+pushd ${RUBY_SOURCE_DIR}
+./configure
+make
+make install
+popd