start implementing db interface

internal/ap/service.go

@@ -20,9 +20,16 @@
 package ap
 
 import (
-   "github.com/go-fed/activity/pub"
+// "github.com/go-fed/activity/pub"
 )
 
-func main() {
-   pub.NewFederatingActor()
+// Service is an activityPub service that uses go-fed to provide federation capabilities
+type Service interface {
+}
+
+type service struct {
+}
+
+// NewService returns an activityPub Service
+func NewService() {
 }