Factor in different formats for endpoints (#4799)

config/application.rb

@@ -42,7 +42,8 @@ module Greenlight
     config.active_storage.variant_processor = :mini_magick
 
     config.bigbluebutton_endpoint = ENV.fetch('BIGBLUEBUTTON_ENDPOINT', 'https://test-install.blindsidenetworks.com/bigbluebutton/api')
-    config.bigbluebutton_endpoint = File.join(config.bigbluebutton_endpoint, '/api') unless config.bigbluebutton_endpoint.end_with?('api', 'api/')
+    config.bigbluebutton_endpoint = File.join(config.bigbluebutton_endpoint, '') unless config.bigbluebutton_endpoint.end_with?('/')
+    config.bigbluebutton_endpoint = File.join(config.bigbluebutton_endpoint, '/api/') unless config.bigbluebutton_endpoint.end_with?('api', 'api/')
 
     config.bigbluebutton_secret = ENV.fetch('BIGBLUEBUTTON_SECRET', '8cd8ef52e8e101574e400365b55e11a6')
   end