Add a per setup unique machine-id (#257)

* add mount for machine-id
* services should check the availability of the machine id before starting
* add a note to the readme
* add new mounts to the multiserver example
* add dockerize to kweb
* fix meet demo

webapp/start.sh

@@ -53,6 +53,11 @@ done
 echo "Ensure config ownership"
 chown -R www-data:www-data /run/sessions /tmp/webapp
 
+# services need to be aware of the machine-id
+dockerize \
+	-wait file:///etc/machine-id \
+	-wait file:///var/lib/dbus/machine-id
+
 set +u
 # cleaning up env variables
 unset "${!KCCONF_@}"