[etherpad-web/oscp-backend] Drop --no-install-recommends

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 5f924fe59e69960a3a4f5090ad192141bf245c1e
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed May 20 11:01:22 2020 +0200

    Drop --no-install-recommends

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 93c8499..c5c6dc1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM node:10-buster-slim
 ENV ETHERPAD_VERSION 1.8.4
 ENV NODE_ENV production
 
-RUN apt-get update --no-install-recommends && \
+RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \
     ca-certificates curl unzip mariadb-client libreoffice-core libreoffice-common && \
     rm -r /var/lib/apt/lists/* /var/cache/apt/*