Dockerfile
FROM ruby:2.4.1-alpine
RUN apk update && apk upgrade && \
apk add --no-cache bash git openssh build-base
RUN apk add --no-cache postgresql-dev
RUN gem install bundler -v 1.16.0
WORKDIR /opt/phobos_db_checkpoint
ADD Gemfile Gemfile
ADD phobos_db_checkpoint.gemspec phobos_db_checkpoint.gemspec
ADD lib/phobos_db_checkpoint/version.rb lib/phobos_db_checkpoint/version.rb
RUN bundle config build.pg --with-pg-config=/usr/pgsql-9.6/bin/pg_config
RUN bundle install
ADD . .