[discourse-web] Install jemalloc

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 10c3dea3a7325ad33f7fc09a365d76f13566ab17
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Fri Sep 18 11:24:00 2020 +0200

    Install jemalloc

 Dockerfile | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index a620813..207ba14 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,19 @@
-FROM ruby:2.6.5
+FROM ruby:2.6.6
 LABEL maintainer="GNOME Sysadmins <gnome-sysadmin gnome org>"
 
+ENV RUBY_ALLOCATOR /usr/lib/libjemalloc.so.1
+ENV RAILS_ENV production
+
 ### Install prerequisites #############################
-RUN apt update && \
-    apt install -y wget lsb-release && \
+RUN apt-get update && \
+    apt-get install -y wget lsb-release && \
     echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" > 
/etc/apt/sources.list.d/pgdg.list && \
     wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
     curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
     echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list && \
     curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -  && \
     apt-get update && apt-get -y upgrade && \
-    apt-get -y install build-essential gettext \
+    apt-get -y install build-essential gettext libjemalloc2 \
     # Install postgres
     postgresql-client-12 \
     # Install image utilities