Dockerfile in netbox-client-ruby-0.1.0 vs Dockerfile in netbox-client-ruby-0.1.1

@@ -1,11 +1,15 @@
-FROM ruby:2.3.4-alpine
+ARG RUBY_VERSION=2.3.4
+FROM ruby:${RUBY_VERSION}-alpine
 
-RUN apk add --no-cache git
+RUN apk add --no-cache git openssl-dev build-base
 
 RUN mkdir /app
 WORKDIR /app
 
+COPY Gemfile Gemfile.lock netbox-client-ruby.gemspec VERSION ./
+RUN bundle install --jobs 4 --deployment --quiet
+
 COPY . ./
-RUN bundle install --jobs 4 --quiet --deployment
+
 
 CMD docker/start.sh