[etherpad-web/oscp-backend] Update to 1.8.3 (and switch to nodejs 12)

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit e799b6d24f50d3eb6e2d3bad0dc850fa19daceb1
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Tue May 12 23:27:23 2020 +0200

    Update to 1.8.3 (and switch to nodejs 12)

 Dockerfile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 9040aee..e9a4b74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-FROM centos/nodejs-10-centos7
-ARG ETHERPAD_VERSION="1.8.0"
+FROM centos/nodejs-12-centos7
+ARG ETHERPAD_VERSION="1.8.3"
 
 USER root
 
@@ -18,7 +18,7 @@ RUN curl -L -o /tmp/etherpad.tar  https://github.com/ether/etherpad-lite/tarball
 WORKDIR /opt/etherpad
 
 # Install a few default plugins:
-SHELL ["/usr/bin/scl", "enable", "rh-nodejs10"]
+SHELL ["/usr/bin/scl", "enable", "rh-nodejs12"]
 RUN npm install ep_adminpads \
     ep_font_family \
     ep_font_size \