add submitters api

lib/api_path_consider_json_middleware.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class ApiPathConsiderJsonMiddleware
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    if env['PATH_INFO'].starts_with?('/api') &&
+       !env['PATH_INFO'].ends_with?('/documents') &&
+       !env['PATH_INFO'].ends_with?('/attachments')
+      env['CONTENT_TYPE'] = 'application/json'
+    end
+
+    @app.call(env)
+  end
+end