[etherpad-web/oscp-backend] Revert "Re-attempt 1.8.3 upgrade"

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 69af181344dff458821236df207c8b74c1b334e3
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed May 13 11:53:53 2020 +0200

    Revert "Re-attempt 1.8.3 upgrade"

 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 9b99726..6164082 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM centos/nodejs-10-centos7
-ARG ETHERPAD_VERSION="1.8.3"
+ARG ETHERPAD_VERSION="1.8.0"
 
 USER root
 
@@ -28,6 +28,8 @@ RUN npm install ep_adminpads \
     ep_markdown \
     ep_copy_paste_select_all \
     ep_copy_paste_images \
+    ep_font_family \
+    ep_font_size \
     ep_aa_file_menu_toolbar
 
 RUN /opt/etherpad/bin/fix-permissions.sh /opt/etherpad && \