Fix webfinger discovery route

app/controllers/api/openid_connect/discovery_controller.rb

@@ -5,7 +5,7 @@ module Api
         jrd = {
           links: [{
             rel:  OpenIDConnect::Discovery::Provider::Issuer::REL_VALUE,
-            href: File.join(root_url, "api", "openid_connect")
+            href: root_url
           }]
         }
         jrd[:subject] = params[:resource] if params[:resource].present?

config/routes.rb

@@ -247,13 +247,13 @@ Diaspora::Application.routes.draw do
       resources :authorizations, only: %i(new create destroy)
       post "authorizations/new", to: "authorizations#new"
 
-      get ".well-known/webfinger", to: "discovery#webfinger"
-      get ".well-known/openid-configuration", to: "discovery#configuration"
       get "jwks.json", to: "id_tokens#jwks"
 
       get "user_info", to: "user_info#show"
     end
   end
 
+  get ".well-known/webfinger", to: "api/openid_connect/discovery#webfinger"
+  get ".well-known/openid-configuration", to: "api/openid_connect/discovery#configuration"
   get "user_applications", to: "user_applications#index"
 end

spec/controllers/api/openid_connect/discovery_controller_spec.rb

@@ -8,7 +8,7 @@ describe Api::OpenidConnect::DiscoveryController, type: :controller do
 
     it "should return a url to the openid-configuration" do
       json_body = JSON.parse(response.body)
-      expect(json_body["links"].first["href"]).to eq("http://test.host/api/openid_connect")
+      expect(json_body["links"].first["href"]).to eq("http://test.host/")
     end
 
     it "should return the resource in the subject" do