[discourse-web] npm doesn't get install as part of the nodejs installation anymore

[Andrea Veri <averi src gnome org>]

commit 355b4404bc8a635aa1a3862fbc0128f2626446ec
Author: Andrea Veri <av gnome org>
Date:   Mon Oct 14 17:41:12 2019 +0000

    npm doesn't get install as part of the nodejs installation anymore

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 004ccdd..f43f7e5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ RUN apt update && \
     # Install image utilities
     advancecomp jpegoptim gifsicle libjpeg-turbo-progs libpng-dev optipng pngcrush pngquant jhead gsfonts \
     # Install nodejs and npm
-    nodejs \
+    nodejs npm \
     # Needed by init-assets.sh
     brotli && \
     # Fix https://meta.discourse.org/t/uglifier-error-during-assets-precompile/96970