add one log to imaginary container so that one know that it has started

Signed-off-by: Simon L <szaimen@e.mail.de>

Containers/imaginary/start.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+echo "Imaginary has started"
 if [ -z "$IMAGINARY_SECRET" ]; then
     imaginary -return-size -max-allowed-resolution 222.2 "$@"
 else