Add missing priority argument

Change-Id: Ib96fc6d3f27ac0c6f846234c30a12c2ee2bc221a
diff --git a/nginx.nix b/nginx.nix
index 877dc21..16ef120 100644
--- a/nginx.nix
+++ b/nginx.nix
@@ -142,7 +142,7 @@
                     };
                 })
             else if service.type == "path"
-                then _merge service.service currentConfig service.path service.secure
+                then _merge service.service currentConfig service.path service.secure priority
             else if service.type == "compose"
                 then (_iterateCompose service.services currentConfig currentPath secure priority 0)
             else throw "Unknown service type: ${service.type}";