[discourse-web/flathub] Don't install postgres 11

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit dffad5a447502c1d8ea0d541c565c6ee66d956da
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed Oct 7 12:46:00 2020 +0200

    Don't install postgres 11

 Dockerfile | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index f06f674..fbaf6da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,19 +4,13 @@ FROM discourse/base:2.0.20200724-1815
 LABEL maintainer="Discourse Administrators <discourse-admins cern ch>" \
       io.openshift.expose-services="8080,3000,6379:http"
 
-ENV PG_MAJOR 11
 ENV RUBY_ALLOCATOR /usr/lib/libjemalloc.so.1
 ENV RAILS_ENV production
+ENV DEBIAN_FRONTEND noninteractive 
 
-### Install prerequisites #############################
-# Install PG_11 for CERN
-# n.b.: https://github.com/discourse/discourse_docker/commit/82e4d76f8bb93a3517a71ebb0c710307101476be
-RUN DEBIAN_FRONTEND=noninteractive apt-get purge -y postgresql-12 postgresql-client-12 postgresql-contrib-12 
&& \
-    apt -y update && \
-    apt -y install postgresql-${PG_MAJOR} postgresql-client-${PG_MAJOR} \
-    postgresql-contrib-${PG_MAJOR} \
-    # Use gettext for envsubst
-    gettext
+# Use gettext for envsubst
+RUN apt-get update && \
+    apt-get install -y gettext
 RUN apt clean
 
 ### Configure Nginx
@@ -112,4 +106,4 @@ RUN chmod +x ./run-discourse.sh ./run-nginx.sh ./run-redis.sh ./init-dbmigration
     chmod +x /discourse/config/unicorn_launcher
 
 ### entrypoint will be overriden for init-containers
-ENTRYPOINT ["./run-discourse.sh"]
\ No newline at end of file
+ENTRYPOINT ["./run-discourse.sh"]