server running

.gitignore

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+/node_modules
+package-lock.json

index.js

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+const express = require("express");
+const app = express();
+const bodyParser = require("body-parser");
+const morgan = require("morgan");
+const mongoose = require("mongoose");
+const cors = require("cors");
+
+/**
+ * Database connectivity
+ */
+const localurl = "mongodb://127.0.0.1/moscow"
+mongoose
+    .connect(localurl, { useNewUrlParser: true }, (err, db) =>{
+        if(err){
+            console.log(err);
+            console.log("Database Connectivity Error!!");
+        } else {
+            console.log("Database Connectivity Successfull!");
+        }
+    })
+mongoose.Promise = global.Promise;
+
+
+/**
+ * Using MiddleWares
+ */
+app.use(morgan("dev"));
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(bodyParser.json());
+// handling cors errors
+app.use(cors());
+
+
+/**
+ * Routes
+ */
+// const rootRoutes = require('./routes/index.js');
+
+// app.use('/api', rootRoutes);
+
+
+
+
+// Handling the errors
+/**
+ * If none of the above middlewares are hit there is definately an error
+ */
+app.use((req, res, next) => {
+    // create a new error object(inbuilt)
+    const error = new Error("Not Found!!");
+    error.status = 404;
+    // call the universal error handler and pass it to the next middleware this error
+    // Till here it was sure that a wrong url has been hit. 
+    next(error);
+});
+
+/**
+ * Handling universal errors like dberror or server error etc
+ * we'll have a error function from the previous middleware || from the universal error
+ * This route is bound to hit
+ */
+app.use((error, req, res, next) => {
+    res.status(error.status || 500);
+    res.json({
+        "error": {
+            "message": error.message
+        }
+    });
+});
+
+
+
+// get the port no.
+const port = 5000 || process.env.PORT;
+
+app.listen(port, "localhost", ()=>{
+    console.log("Server running at port " + port);
+});

package.json

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+{
+  "name": "hack-moscow",
+  "version": "1.0.0",
+  "description": "Our team project for Hack.Moscow",
+  "main": "index.js",
+  "scripts": {
+    "start" : "nodemon index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Zemotacqy/hack-moscow.git"
+  },
+  "keywords": [
+    "Hack.Moscow"
+  ],
+  "author": "Zemotacqy",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/Zemotacqy/hack-moscow/issues"
+  },
+  "homepage": "https://github.com/Zemotacqy/hack-moscow#readme",
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "mongoose": "^5.7.7",
+    "morgan": "^1.9.1",
+    "nodemon": "^1.19.4"
+  }
+}