Add expressjs benchmarks similar to iris and netcore but MVC

Former-commit-id: 0f56ebf040514ee332b6b4a13ecc02ce6cd339c7

_benchmarks/expressjs/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "expressjs-app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Gerasimos (Makis) Maropoulos <kataras2006@hotmail.com>",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.16.0"
+  }
+}