Signal-desktop in a container

Note: This isn't supported by whisper systems - use at your own risk etc

To build the container locally:

docker build -t signal .

The application uses sandboxing to make it work so you'll need to add the sys_admin capability to the container to make that go

docker run -it --rm -v /tmp/.X11-unix:/tmp/.X11-unix -e "DISPLAY=${DISPLAY}" -e USERID=${UID} --name=signal --cap-add sys_admin signal

If you dont want to do that adding -e nosandbox=1 to the docker line will enable the --no-sandbox option for the application negating the need for the extra capability. Sandbox exists for a reason, use without it at own risk etc

Add extra volumes for downloads/uploads with extra docker volume options ( -v )

Your user ID (UID) is needed so signal can talk to your display manager

User profile data will be saved to /data/signal/.config/Signal within the container and stopping the container will remove that data unless...

Map that to your host system by adding this to your docker line:

-v ${HOME}/.config/Signal:/data/signal/.config/Signal