From b0c82f01d0463ca73f3aff8d3f4755fa6394776f Mon Sep 17 00:00:00 2001
From: Alexis 'Horgix' Chotard <alexis.horgix.chotard@gmail.com>
Date: Sun, 26 Jun 2016 15:19:07 +0200
Subject: [PATCH] Dockerfile: merge apk update and upgrade

---
 Dockerfile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index b4b757f5..c35d9f86 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,8 +7,7 @@ FROM alpine:latest
 MAINTAINER Radicale project "radicale@librelist.com"
 
 # Base packages
-RUN apk update \
-      && apk upgrade \
+RUN apk --update --update-cache upgrade \
       && apk add \
           python3 \
           python3-dev \