From 5e42f6778357f9509f2335c7fe34c5fd5bf5c43a Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Fri, 22 Feb 2019 17:23:33 +0000
Subject: [PATCH] Dockerfile: install zlib headers (for nokogiri gem).

---
 Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dockerfile b/Dockerfile
index 25c13b6a3d..d210a61626 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ RUN apt-get update \
 		fonts-dejavu-core \
 		g++ \
 		git \
+		libz-dev \
 		locales \
 		make \
 		openssh-client \