[discourse-web] Use the stable branch instead of a specific release

[Andrea Veri <averi src gnome org>]

commit 5bd47feb6a47d1b84411ee1adeef4ba84e0395b9
Author: Andrea Veri <averi redhat com>
Date:   Thu Feb 28 12:01:16 2019 +0100

    Use the stable branch instead of a specific release

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index e5667e6..5b38bfd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,7 @@ RUN apt update && \
 
 ### Set up Discourse ##################################
 #   - So we can overrride it with --build_arg
-ARG DISCOURSE_VERS='v2.3.0.beta2'
+ARG DISCOURSE_VERS='stable'
 ENV DISCOURSE_RELEASE=$DISCOURSE_VERS RAILS_ENV=production RAILS_ROOT=/discourse HOME=/discourse
 
 RUN mkdir -p discourse && \