[etherpad-web/oscp-backend] Fix permissions to /.npm

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 955d4c8cbc1fda9e42097122274f889804b7065f
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed May 13 12:50:12 2020 +0200

    Fix permissions to /.npm

 Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index c0bef68..18158fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,7 +30,8 @@ RUN npm install ep_adminpads \
 ADD fix-permissions.sh /fix-permissions.sh
 ADD entrypoint.sh /entrypoint.sh
 
-RUN /fix-permissions.sh /opt/etherpad
+RUN /fix-permissions.sh /opt/etherpad && \
+    /fix-permissions.sh /.npm
 
 USER 1001