Make athenapdf-service run as non-root user

[derkoe]

• Xvfb needs the directory /tmp/.X11-unix/ to be owned by root
• headless chrome needs a writeable HOME directory
• enables to run the image for example with "-u 101010:0"
• the server can be run on OpenShift and K8s clusters with SCC

[MrSaints]

@djackson-saa if you're still interested, this might solve your problem.

[djackson-saa]

Thanks... I will check it out soon.