add: explanation about Docker
add: explanation about Docker

matthieucan/quebec-monitoring,matthieucan/quebec-monitoring,savoirfairelinux/quebec-monitoring,matthieucan/quebec-monitoring,matthieucan/quebec-monitoring,savoirfairelinux/quebec-monitoring,savoirfairelinux/quebec-monitoring,savoirfairelinux/quebec-monitoring