StirlingPDF container keeps binding to localhost (127.0.0.1) instead of 0.0.0.0 despite custom settings

Dear Unraid community,

I'm struggeling make StirlingPDF listen to all networks and set port to 80 instead of localhost and port 8080 (Default)

I tried following:

• deleting the container with image and appdata files and reinstalling it

• during install set Network Type: to custom with address: 10.10.10.9 (it's available and I also tried different ones)

• delete the default container port and add new one with port 80

• add following lines to the custom_settings.yml according to StirlingPDF Documenteration

  server:
    port: 80
    address: 0.0.0.0

  but nothing helped, logs keep showing it's still listening to localhost

• adding following variable to the container template (Deepseek suggestion):

  Key: JAVA_TOOL_OPTIONS
  Value: -Dserver.address=0.0.0.0

so please help me to understand wtf is it that hard to run this container on a custom settings?