ci(build): fix isard-vpn docker image build with docker-compose v2
ci(build): fix isard-vpn docker image build with docker-compose v2

Signed-off-by: Simó Albert i Beltran <6f7d207d69feb6f6fee3b97855e8d3812485c154@bona.gent>

isard-vdi/isard,isard-vdi/isard,isard-vdi/isard,isard-vdi/isard,isard-vdi/isard