fix errors on insertion to game, fix db creation of game

internal/foundry/temp_models/json/game.go

@@ -1,6 +1,7 @@
 package json
 
 import (
+	"encoding/json"
 	"sync"
 
 	"gitea.local.lab/Lbenedar/foundry_helper_service/internal/foundry/temp_models/db"
@@ -40,6 +41,19 @@ type Game struct {
 	// Template        Template                       `json:"template"`
 }
 
+func ParseGame(data []byte) (*Game, error) {
+	var modelGame []Game
+	err := json.Unmarshal(data, &modelGame)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(modelGame) > 1 {
+		return nil, ErrorSetupMoreThanOne
+	}
+	return &modelGame[0], nil
+}
+
 func (g *Game) ToDB(dest *db.Game) bool {
 	dest.UserID = g.UserID
 	dest.DemoMode = g.DemoMode