The Mets have not a lot of reasons to smile and laugh through the first month of the season. A dreadful start has put them miles behind in the National League East and there's widespread speculation that manager Carlos Mendoza could potentially find himself in the same situation as Alex Cora and Rob Thomson . But Tuesday night was a legitimately good time for the the home side at Citi Field as New York cruised to an 8-0 victory over the Nationals. Clay Holmes turned in another dazzling start and Juan Soto hit his first home run since returning from an injury that kept him out of the lineup for nearly three weeks. Soto's two-run shot was a reminder of what he's bringing to the table and seeing a .300 average and .867 OPS on the scoreboard when he bats might go a long way in cooling down Mets fans on the ledge. As is often the case, Soto was caught just having fun out there during an at-bat in the seventh inning.…