[survey-web/oscp] Fix ln invocation

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 630c426da98e441da99fbca66b485429b8125f82
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu Jan 7 19:02:31 2021 +0100

    Fix ln invocation

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index d6a3103..d7d53c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,6 @@ ADD entrypoint.sh /entrypoint.sh
 
 RUN chown -R root:root /var/www/html/application/config && \
     install -d /app/limesurvey/ && \
-    ln -s /var/www/html/upload/ /app/limesurvey/upload/
+    ln -s /var/www/html/upload/ /app/limesurvey/upload
 
 ENTRYPOINT ["/entrypoint.sh"]