fixing npm install

Author: Ric Harvey

start.sh

@@ -16,7 +16,8 @@ procs=$(cat /proc/cpuinfo |grep processor | wc -l)
 sed -i -e "s/worker_processes 5/worker_processes $procs/" /etc/nginx/nginx.conf
 
 # install npm requirements
-npm install /usr/share/nginx/html/package.json
+cd /usr/share/nginx/html/
+npm install
 
 # Very dirty hack to replace variables in code with ENVIRONMENT values