add sqlc and sqlite

backend/internal/db/connect.go

@@ -0,0 +1,33 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+
+	_ "modernc.org/sqlite"
+)
+
+const driver = "sqlite"
+
+func Connect() (*sql.DB, error) {
+	path := os.Getenv("DB_PATH")
+	if path == "" {
+		path = "vaultdrop.db"
+	}
+
+	dsn := fmt.Sprintf("file:%s?_journal_mode=WAL&_busy_timeout=5000&_foreign_keys=on", path)
+
+	database, err := sql.Open(driver, dsn)
+	if err != nil {
+		return nil, fmt.Errorf("open db: %w", err)
+	}
+
+	database.SetMaxOpenConns(1)
+
+	if err := database.Ping(); err != nil {
+		return nil, fmt.Errorf("ping db: %w", err)
+	}
+
+	return database, nil
+}