add product model and seed script

common/models/product.js

@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = function(Product) {
+
+};

common/models/product.json

@@ -0,0 +1,34 @@
+{
+  "name": "product",
+  "plural": "products",
+  "base": "PersistedModel",
+  "idInjection": true,
+  "options": {
+    "validateUpsert": true
+  },
+  "properties": {
+    "id": {
+      "type": "string",
+      "required": true
+    },
+    "name": {
+      "type": "string",
+      "required": true
+    },
+    "description": {
+      "type": "string"
+    },
+    "price": {
+      "type": "number",
+      "required": true
+    },
+    "added": {
+      "type": "date",
+      "required": true
+    }
+  },
+  "validations": [],
+  "relations": {},
+  "acls": [],
+  "methods": {}
+}