FIX: can't bootstrap with ember-cli when login_required is enabled (#13350)

app/controllers/bootstrap_controller.rb

@@ -3,6 +3,8 @@
 class BootstrapController < ApplicationController
   include ApplicationHelper
 
+  skip_before_action :redirect_to_login_if_required
+
   # This endpoint allows us to produce the data required to start up Discourse via JSON API,
   # so that you don't have to scrape the HTML for `data-*` payloads
   def index

spec/requests/bootstrap_controller_spec.rb

@@ -74,4 +74,11 @@ describe BootstrapController do
     bootstrap = json['bootstrap']
     expect(bootstrap['extra_locales']).to be_present
   end
+
+  it "returns data when login_required is enabled" do
+    SiteSetting.login_required = true
+    get "/bootstrap.json"
+    expect(response.status).to eq(200)
+    expect(response.parsed_body).to be_present
+  end
 end