Add all plugins from prod

Author: mrjvs

assets/default.container.yml

@@ -10,3 +10,8 @@ hooks:
         cd: $home/plugins
         cmd:
           - git clone https://github.com/discourse/docker_manager.git
+          - git clone https://github.com/discourse/discourse-solved.git
+          - git clone https://github.com/discourse/discourse-math.git
+          - git clone https://github.com/discourse/discourse-graphviz.git
+          - git clone https://github.com/discourse/discourse-assign.git
+          - git clone https://github.com/discourse/discourse-reactions.git