[odrs-web] trivial: Use new flathub download link

[Richard Hughes <rhughes src gnome org>]

commit 9e02b67be3cd67ac7965accdbe9ca98b1bc3fbef
Author: Richard Hughes <richard hughsie com>
Date:   Wed Apr 29 17:57:30 2020 +0100

    trivial: Use new flathub download link

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 38795fb..5595601 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,7 +39,7 @@ RUN LANG=en_US.utf8 \
 
 RUN python3 /opt/app-root/src/cron.py fsck
 
-RUN curl https://flathub.org/repo/appstream/x86_64/appstream.xml.gz -o /tmp/appstream.xml.gz
+RUN curl https://dl.flathub.org/repo/appstream/x86_64/appstream.xml.gz -o /tmp/appstream.xml.gz
 
 RUN python3 /opt/app-root/src/cron.py appstream-import /tmp/appstream.xml.gz