Configure default http method

Author: dlpierce

app/controllers/catalog_controller.rb

@@ -18,6 +18,8 @@ def self.modified_field
   include BlacklightIiifSearch::Controller
 
   configure_blacklight do |config|
+    config.http_method = :post
+
     # IiifPrint index fields
     config.add_index_field 'all_text_tsimv', highlight: true, helper_method: :render_ocr_snippets