Dockerfile in minke-1.8.1

- old
+ new

@@ -1,4 +1,13 @@
 FROM ruby:latest
 
+ENV COMPOSE_VERSION 1.7.1
+ENV MACHINE_VERSION 0.7.0
+
+RUN apt-get update -q \
+	&& apt-get install -y -q --no-install-recommends curl ca-certificates \
+	&& curl -o /usr/local/bin/docker-compose -L \
+		"https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-Linux-x86_64" \
+	&& chmod +x /usr/local/bin/docker-compose
+
 COPY ./Gemfile Gemfile
 RUN bundle install