Added openapi viewers

ref #6

src/loaders/openapi.ts

@@ -1,5 +1,6 @@
 import { validationMetadatasToSchemas } from "@odit/class-validator-jsonschema";
-import { Application } from "express";
+import express, { Application } from "express";
+import path from 'path';
 import { getMetadataArgsStorage } from "routing-controllers";
 import { generateSpec } from '../apispec';
 
@@ -18,6 +19,6 @@ export default async (app: Application) => {
   app.get(["/docs/openapi.json", "/docs/swagger.json"], (req, res) => {
     res.json(spec);
   });
-  //app.use('/api/docs', express.static(path.join(__dirname, '../static/docs'), { index: "index.html", extensions: ['html'] }));
+  app.use('/docs', express.static(path.join(__dirname, '../static/docs'), { index: "index.html", extensions: ['html'] }));
   return app;
 };