improve postgres support

db/local.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"database/sql"
+	"fmt"
 	"log/slog"
 	"strings"
 	"vctp/db/queries"
@@ -42,6 +43,9 @@ func (d *LocalDB) Close() error {
 }
 
 func newLocalDB(logger *slog.Logger, dsn string) (*LocalDB, error) {
+	if looksLikePostgresDSN(dsn) {
+		return nil, fmt.Errorf("database_driver is sqlite but database_url looks like a postgres DSN; set settings.database_driver=postgres")
+	}
 
 	// TODO - work out if https://kerkour.com/sqlite-for-servers is possible without using sqlx
 	/*