Docker: fix slimming and missing ro, hu localizations

Change-Id: Ic3150fa0f893b74a0d71304356881f416e54d0b9
diff --git a/.dockerignore b/.dockerignore
index 0e49640..e2d38d7 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -10,6 +10,7 @@
 !/lib
 !/script
 !/t
+!/loc
 !/templates
 !.dockerignore
 /templates/announcement.html.ep