[feature] Add local user and post count to nodeinfo responses (#1325)

* Add local user and post count to nodeinfo responses

This fixes #1307 (at least partially). The nodeinfo endpoint should now
return the total users on an instance, along with their post count.

* Update NodeInfoUsers docstring and swagger yaml file

1 files changed, 6 insertions, 3 deletions

diff --git a/internal/api/model/well-known.go b/internal/api/model/well-known.go
index 384361fd0..bf61a6085 100644
--- a/internal/api/model/well-known.go
+++ b/internal/api/model/well-known.go
@@ -79,8 +79,11 @@ type NodeInfoServices struct {
 
 // NodeInfoUsage represents usage information about this server, such as number of users.
 type NodeInfoUsage struct {
-	Users NodeInfoUsers `json:"users"`
+	Users      NodeInfoUsers `json:"users"`
+	LocalPosts int           `json:"localPosts"`
 }
 
-// NodeInfoUsers is a stub for usage information, currently empty.
-type NodeInfoUsers struct{}
+// NodeInfoUsers represents aggregate information about the users on the server.
+type NodeInfoUsers struct {
+	Total int `json:"total"`
+}