Entrusting The Catering Service With Application Of The Minimum Environmental Criteria, Pursuant To Art. 57 D. Lgs. 36/2023, In Accordance With The Guidelines For Sustainable University Catering, At The Canteen Of The Parthenope Residence, Naples And At The Refreshment Points Located Within The University Complex "Viale Lincoln" And Of The University Complex "Viale Ellitico", Caserta