Add public cache control to application responses

Author: Shpigford

app/controllers/application_controller.rb

@@ -1,4 +1,6 @@
 class ApplicationController < ActionController::Base
+  before_action :set_public_cache
+
   include SentryContext
   include Redirectable
 
@@ -13,4 +15,10 @@ class ApplicationController < ActionController::Base
     Sentry.capture_exception(e) if defined?(Sentry)
     raise e
   end
+
+  private
+
+  def set_public_cache
+    response.headers["Cache-Control"] = "public, max-age=3600"
+  end
 end