Add food functions

src/game/game.js

@@ -15,6 +15,15 @@ module.exports = {
       }
       gameBoard.push(row);
     }
+    for (var i = 0; i < 10; i++) {
+      gameBoard = addFood(gameBoard);
+    }
+    return gameBoard;
+  },
+
+  addFood: (gameBoard) => {
+    // select a random cell that is empty
+    // set the cell to FOOD
     return gameBoard;
   },