Add a nodeinfo endpoint (#12002)

* Add nodeinfo endpoint

* dont commit stuff from my local dev

* consistant naming since we implimented 2.1 schema

* Add some additional node info stuff

* Add nodeinfo endpoint

* dont commit stuff from my local dev

* consistant naming since we implimented 2.1 schema

* expanding this to include federation info

* codeclimate feedback

* CC feedback

* using activeserializers seems like a good idea...

* get rid of draft 2.1 version

* Reimplement 2.1, also fix metaData -> metadata

* Fix metaData -> metadata here too

* Fix nodeinfo 2.1 tests

* Implement cache for monthly user aggregate

* Useless

* Remove ostatus from the list of supported protocols

* Fix nodeinfo's open_registration reading obsolete setting variable

* Only serialize domain blocks with user-facing limitations

* Do not needlessly list noop severity in nodeinfo

* Only serialize domain blocks info in nodeinfo when they are set to be displayed to everyone

* Enable caching for nodeinfo endpoints

* Fix rendering nodeinfo

* CodeClimate fixes

* Please CodeClimate

* Change InstancePresenter#active_user_count_months for clarity

* Refactor NodeInfoSerializer#metadata

* Remove nodeinfo 2.1 support as the schema doesn't exist

* Clean-up

1 files changed, 7 insertions, 0 deletions

diff --git a/app/lib/nodeinfo/adapter.rb b/app/lib/nodeinfo/adapter.rb
new file mode 100644
index 000000000..1b48dcb98
--- /dev/null
+++ b/app/lib/nodeinfo/adapter.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class NodeInfo::Adapter < ActiveModelSerializers::Adapter::Attributes
+  def self.default_key_transform
+    :camel_lower
+  end
+end