Add missing comments

internal/server/data/resource.go

@@ -28,6 +28,7 @@ import (
 	"github.com/gorilla/mux"
 )
 
+// Constants for error reasons
 const (
 	ResourceItemNotFound = "Resource Item Not Found"
 	NonIntegerValue      = "Non Integer Value"

internal/server/data/state.go

@@ -27,8 +27,10 @@ type safeHandlerMap struct {
 	m  *sync.RWMutex
 }
 
+// Singleton containing all current handlers as a safeHandlerMap
 var Handlers = New()
 
+// New creates a read-to-use safeHandlerMap
 func New() safeHandlerMap {
 	return safeHandlerMap{
 		hs: make(map[string]*model.Handler),