Only install dependencies if package.json is present

Author: erikap

Dockerfile

@@ -15,4 +15,4 @@ RUN npm install
 CMD sh boot.sh
 
 ONBUILD ADD . /app/
-ONBUILD RUN cd /usr/src/app && npm install && npm install /app
+ONBUILD RUN cd /usr/src/app && npm install && if [ -f "/app/package.json" ]; then npm install /app; fi

boot.sh

@@ -1,7 +1,9 @@
 #! /bin/sh
-
 ## Install new dependencies
-npm install /app
+if [ -f "/app/package.json" ];
+then
+   npm install /app
+fi
 npm install
 
 if [ "$NODE_ENV" == "production" ];