Unlock the Keg recipe at Farming Level 8
Gather 30 Wood, 1 Copper Bar, 1 Iron Bar, and 1 Oak Resin
Craft a Keg
Harvest fruit or crops
Place the fruit or crop into the Keg
Wait for the item to finish processing
Collect the wine from the Keg
Use higher-quality fruit for more valuable wine
Age wine in a Cask if you want to increase its quality further