feat: leveling system

internal/db/db.go

@@ -0,0 +1,26 @@
+package db
+
+import (
+	"database/sql"
+	"time"
+	"velox-bot/internal/config"
+
+	_ "github.com/jackc/pgx/v5/stdlib"
+)
+
+func NewDB(config *config.Config) (*sql.DB, error) {
+	pool, err := sql.Open("pgx", config.DBHost)
+	if err != nil {
+		return nil, err
+	}
+
+	pool.SetMaxIdleConns(10)
+	pool.SetMaxOpenConns(100)
+	pool.SetConnMaxLifetime(time.Hour)
+
+	if err := pool.Ping(); err != nil {
+		return nil, err
+	}
+
+	return pool, nil
+}