[discourse-web/gnome] Update base image

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit aec786e45d81b550afabd23c6d030386829775ad
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu Jan 28 15:16:26 2021 +0100

    Update base image

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 3d3d83c..629bb37 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Check https://github.com/discourse/discourse_docker/blob/master/launcher
-FROM discourse/base:2.0.20201125-2246
+FROM discourse/base:2.0.20201221-2020
 
 LABEL maintainer="Discourse Administrators <discourse-admins cern ch>" \
       io.openshift.expose-services="8080,3000,6379:http"