# Development Log: 2021-11-02

2021 November 2

Made a backup AMI:
Scanalyst Backup 2021-11-02  ami-03331fe51ec62d4c2
/           snap-072d19f4ae0d3caa2
/server     snap-071181bf8049f01ed

Made a mirror backup to Juno.

To install, remove, or modify a plug-in, according to:
https://meta.discourse.org/t/install-plugins-in-discourse/19157
edit the ~/discourse/image/containers/app.yml file and modify
the lines after:
- git clone https://github.com/discourse/docker_manager.git
which clone the Git repositories of the plug-ins.  Then
rebuild the application with:
super
cd ~/discourse/image
./launcher rebuild app

The problem with MathJax was that I had installed the plug-in
to which I was directed by a Web search, that being:
https://github.com/kasperpeulen/discourse-mathjax
which I believe is actually linked to in several documents
on the Discourse site.  This is, in fact, an old version of the
plug-in which is no longer compatible with Discourse and
causes the errors we were encountering.  I finally found this
document:
https://meta.discourse.org/t/discourse-math-plugin/65770
which says that one should now use the "Official MathJax
Support for Discourse", which is hosted at:
https://github.com/discourse/discourse-math
and has a clone address of:
https://github.com/discourse/discourse-math.git
I added this to app.yml and rebuilt Discourse as described
above and, after I remembered you have to manually enable a
newly-installed plug-in, it works perfectly with my
test document in the Sand Box:
https://scanalyst.fourmilab.ch/t/test-of-mathjax/22

Changed the permissions on the Sand Box so Moderators can