fix: correct SQLite database connection string and add connection validation

main.go

@@ -77,7 +77,7 @@ func main() {
 	defer logger.Sync()
 
 	if cfgErr != nil {
-		logger.Fatal("Failed to load config", zap.Error(err))
+		logger.Fatal("Failed to load config", zap.Error(cfgErr))
 	}
 	fmt.Println("test")
 
@@ -96,17 +96,34 @@ func main() {
 	}
 
 	// Initialize database connection
-	dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s",
+	var dsn string
-		cfg.DB.User, cfg.DB.Password, cfg.DB.Host, cfg.DB.Port, cfg.DB.DBName)
+	if cfg.DB.Driver == "sqlite3" {
+		// For SQLite, the DSN is just the path to the database file
+		dsn = cfg.DB.DBName
+	} else {
+		// For other databases like MySQL, use the standard connection string
+		dsn = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s",
+			cfg.DB.User, cfg.DB.Password, cfg.DB.Host, cfg.DB.Port, cfg.DB.DBName)
+	}
+	
+	var err error
 	db, err = sql.Open(cfg.DB.Driver, dsn)
 	if err != nil {
 		logger.Fatal("Failed to connect to database", zap.Error(err))
 	}
 	defer db.Close()
 
-	logger.Info("migrating sqlite database")
+	// Test the connection
-	if err := migrateSqlite(db); err != nil {
+	if err = db.Ping(); err != nil {
-		logger.Fatal("Failed to migrate database", zap.Error(err))
+		logger.Fatal("Failed to ping database", zap.Error(err))
+	}
+	logger.Info("Successfully connected to database", zap.String("driver", cfg.DB.Driver))
+
+	if cfg.DB.Driver == "sqlite3" {
+		logger.Info("migrating sqlite database")
+		if err := migrateSqlite(db); err != nil {
+			logger.Fatal("Failed to migrate database", zap.Error(err))
+		}
 	}
 
 	// Initialize Echo