migrate to postgres

backend/internal/db/connect.go

@@ -5,25 +5,23 @@ import (
 	"fmt"
 	"os"
 
-	_ "modernc.org/sqlite"
+	_ "github.com/lib/pq"
 )
 
-const driver = "sqlite"
+const driver = "postgres"
 
 func Connect() (*sql.DB, error) {
-	path := os.Getenv("DB_PATH")
-	if path == "" {
-		path = "vaultdrop.db"
+	dsn := os.Getenv("DATABASE_URL")
+	if dsn == "" {
+		dsn = "postgres://localhost:5432/vaultdrop?sslmode=disable"
 	}
 
-	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)
+	database.SetMaxOpenConns(25)
 
 	if err := database.Ping(); err != nil {
 		return nil, fmt.Errorf("ping db: %w", err)