v0.12.0 migrate sqlite3 to psql18, updated auth, deploy docs, account and replay updates

internal/server/board/board.go

@@ -116,4 +116,4 @@ func (b *Board) GetPieceAt(square string) byte {
 	file := square[0] - 'a'
 	rank := '8' - square[1]
 	return b.squares[rank][file]
-}
+}