systemd unit: always start before infopoint-html.service

s0infodisplay.service

 [Unit]
 Description=A Infopoint Display that shows HTML pages in fullscreen
 Requires=network.target
+Before=infopoint-html.service
 
 [Service]
 ExecStart=/bin/sh -c 'cd /home/pi/s0infodisplay; node main.js'