[etherpad-web/oscp-backend] Revert "Bump etherpad release to 1.8"

[Andrea Veri <averi src gnome org>]

commit 9915b85e02b8c5977775c3718e1d3484fb88e223
Author: Andrea Veri <averi redhat com>
Date:   Thu Nov 28 23:51:28 2019 +0100

    Revert "Bump etherpad release to 1.8"
    
    This reverts commit 1f113d9c5cc5ed834b2d5591fe050e3193b36542.

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 1bae836..5920c9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM centos:7
 MAINTAINER Wolfgang Kulhanek <WolfgangKulhanek gmail com>
-ARG ETHERPAD_VERSION="1.8"
+ARG ETHERPAD_VERSION="1.7.5"
 
 LABEL name="Etherpad Lite" \
       io.k8s.display-name="Etherpad Lite" \