how to install signal-desktop in a sandbox on subgraph os

1. paxrat configurations, quoted from hThoreau:

I've had to add a pax profile for wire-desktop, like so: 

user@subgraph:~$ cat /etc/paxrat/conf.d/wire-desktop.conf

{ "/opt/wire-desktop/wire-desktop": {
  "flags": "m"
  }
}

After that, have it loaded by paxrat using sudo paxrat -x and then run it. If this does not work for you, try calling it while running sudo journalctl -f on another terminal window, and then launching it. Then, publish here the output of it so that we can assess what it blocking your application.

https://github.com/subgraph/subgraph-os-issues/issues/264#issuecomment-345532376

2. oz configurations

• https://github.com/subgraph/oz/issues/131
• https://gist.github.com/unsigned-nerd/a288dd9b3df6b2df3996adb1d963cd7b