[odrs-web] Fix gzip for RHEL-7

[Richard Hughes <rhughes src gnome org>]

commit d2b7d79bd187f207a2fc3dd711a8370b36fbc851
Author: Richard Hughes <richard hughsie com>
Date:   Wed Mar 16 16:37:54 2022 +0000

    Fix gzip for RHEL-7
    
    There's no -k option there...

 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 6c96011..7d51971 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,7 +35,9 @@ RUN curl https://raw.githubusercontent.com/hughsie/badwords/master/badwords.csv
 RUN LANG=en_US.utf8 python3 /opt/app-root/src/cron.py taboo-import /tmp/badwords.csv
 
 RUN python3 /opt/app-root/src/cron.py ratings /opt/app-root/src/odrs/static/ratings.json
-RUN gzip -k /opt/app-root/src/odrs/static/ratings.json
+RUN cp /opt/app-root/src/odrs/static/ratings.json /opt/app-root/src/odrs/static/ratings.json.bak
+RUN gzip /opt/app-root/src/odrs/static/ratings.json
+RUN mv /opt/app-root/src/odrs/static/ratings.json.bak /opt/app-root/src/odrs/static/ratings.json
 RUN brotli -k /opt/app-root/src/odrs/static/ratings.json
 
 RUN chown -R 1000310000:0 ${ODRS_HOME} && \