make sure we start in correct folder

bootstrap

@@ -21,14 +21,18 @@ python get-pip.py
 pip install --upgrade requests[security]
 pip install RPi.GPIO
 
-useradd -m -d /home/red -s /bin/bash red
+home_red=/home/red
+
+useradd -m -d ${home_red} -s /bin/bash red
 adduser red dialout
 adduser red tty
 
+package_json=${home_red}/package.json
+
 mv /tmp/sudoers /etc/sudoers
-mv /tmp/package.json /home/red/package.json
+mv /tmp/package.json ${package_json}
 mkdir -p /data
-chown red /data /home/red/package.json
+chown red /data ${package_json}
 
 npm install -g pm2
 
@@ -38,7 +42,8 @@ touch /usr/share/doc/python-rpi.gpio
 mkdir -p /etc/service/node-red
 
 echo "#!/usr/bin/env bash
-exec /sbin/setuser red pm2 start package.json
+cd ${home_red}
+/sbin/setuser red pm2 start ${package_json}
 exec /sbin/setuser red pm2 logs 2>&1
 " > /etc/service/node-red/run