From e67607ddbdc3e3d5b03bf1e6b3702d94dbdd88b7 Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Sat, 16 Sep 2017 19:34:03 +0200
Subject: [PATCH] properly make use of Dockers cache

---
 Dockerfile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 9307e76..498938f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,9 +4,14 @@ FROM node:8.2
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
+# use changes to package.json to force Docker not to use the cache
+# when we change our application's nodejs dependencies:
+ADD package.json /usr/src/app
+RUN npm install
+
 # Install app dependencies
 COPY . /usr/src/app
-RUN npm install && npm run build
+RUN npm run build
 
 VOLUME /usr/src/app/build