From 2c4a177c1729657c6251460d3a2815183a9f6227 Mon Sep 17 00:00:00 2001
From: Kelvin Wong <284779+netsgnut@users.noreply.github.com>
Date: Fri, 26 Oct 2018 21:07:35 +0800
Subject: [PATCH] Use alpine build for Docker

---
 Dockerfile                   | 13 ++++++++++---
 spec/ssh_scan/integration.sh |  2 +-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index a426197c..bcc3dcf9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby
+FROM ruby:alpine
 MAINTAINER Jonathan Claudius
 ENV PROJECT=github.com/mozilla/ssh_scan
 
@@ -6,6 +6,13 @@ RUN mkdir /app
 ADD . /app
 WORKDIR /app
 
-RUN gem install bundler
-RUN bundle install
+# required for ssh-keyscan
+RUN apk --update add openssh-client
+
+RUN apk --update add --virtual build-dependencies ruby-dev build-base && \
+    gem install bundler --no-ri --no-rdoc && \
+    bundle install && \
+    apk del build-dependencies && \
+    rm -rf /var/cache/apk/*
+
 CMD /app/bin/ssh_scan
diff --git a/spec/ssh_scan/integration.sh b/spec/ssh_scan/integration.sh
index b4bb5a57..7764ae13 100755
--- a/spec/ssh_scan/integration.sh
+++ b/spec/ssh_scan/integration.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 command_exists () {
     type "$1" &> /dev/null ;