pkgs manual tests

After we finish #27 we could use containers to test our packages doing video calls from docker.

Jerome show me the way to do it:

docker run --privileged -ti --network=host -v /dev/video0:/dev/video0 -v /dev/snd:/dev/snd -v /dev/dri:/dev/dri -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=${DISPLAY} -v /run/dbus/system_bus_socket:/run/dbus/system_bus_socket -e PULSE_SERVER=unix:/run/pulse/native -v /run/pulse/native:/run/pulse/native -e XAUTHORITY=$XAUTHORITY -v /dev/fb0:/dev/fb0 container_id bash

There the only thing we have to do is to find (using strace) the file that X require to show Jami in our actual display.