[etherpad-web/oscp-backend] Fix permissions on /opt/app-root as well

[Andrea Veri <averi src gnome org>]

commit 3c3e79e564b782b72c3648fdabdfc4def2164086
Author: Andrea Veri <av gnome org>
Date:   Wed Feb 5 00:42:38 2020 +0000

    Fix permissions on /opt/app-root as well

 Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 1e4f197..e9b7f02 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,7 +32,8 @@ RUN npm install ep_adminpads \
 
 RUN /opt/etherpad/bin/fix-permissions.sh /opt/etherpad && \
     /opt/etherpad/bin/fix-permissions.sh /.npm && \
-    /opt/etherpad/bin/fix-permissions.sh /.config
+    /opt/etherpad/bin/fix-permissions.sh /.config \
+    /opt/etherpad/bin/fix-permissions.sh /opt/app-root
 
 # Run as a random user. This happens on openshift by default so we
 # might as well always run as a random user