Disable nukes option (#237)

This makes it possible to disable all nukes as well as missile silos
from the game in privat lobbies and singleplayer games

src/server/Master.ts

@@ -233,6 +233,7 @@ async function schedulePublicGame() {
     infiniteTroops: false,
     instantBuild: false,
     disableNPCs: false,
+    disableNukes: false,
     bots: 400,
   } as GameConfig;