some more relative url roots in editor_edit, removed javascript uglifying for staging, added debug message for docker websocket connection url.

added doku for setting up docker daemon for codeocean

config/environments/staging.rb

@@ -23,7 +23,7 @@ Rails.application.configure do
   config.serve_static_assets = false
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  # config.assets.js_compressor = :uglifier
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.