Sivabharathy K P gotocva

sudo nano /etc/nginx/sites-available/subdomain.maindomain.in

server {
    server_name subdomain.maindomain.in;  # Replace with your domain

    access_log /var/log/nginx/access.log;

In MongoDB, the $lookup stage is used in the aggregation pipeline to perform a left outer join between documents from two collections. This allows you to combine documents from one collection with documents from another based on a specified condition.

Here's an example of using $lookup in MongoDB, assuming you have two collections: orders and products. The goal is to retrieve information about orders along with details about the products they reference:

Suppose you have the following collections:

orders collection:

MEAN Stack Cheat-Sheet

Those who want to become a Full Stack Developer their first choice is MEAN Stack because it has a lot of scopes and easy to learn as well but preparing is hard so Here's a Cheat Sheet - Inspired by The Technical Interview Cheat Sheet.md

This list is meant to be both a quick guide and reference for further research into these topics. It's basically a summary of important topics, there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.



	const express = require('express');
	const cors = require('cors');

	const app = express();

	const env = require('dotenv').config().parsed;
	const fs = require('fs');
	const pm2 = require("pm2");

	import { Injectable } from '@angular/core';
	import Dexie, { Table } from 'dexie';

	interface PostInterface {
	id?: number;
	name?: string;
	age?: number;
	date_of_birth?: string;
	}

	const axios = require('axios');
	const https = require('https');
	const cheerio = require('cheerio');

	const agent = new https.Agent({
	rejectUnauthorized: false
	});

	const init = async () => {
	const response = await axios.get(`https://sivabharathy.in`, { httpsAgent: agent });

	// for global variables names we use the const/let keyword and UPPER_SNAKE_CASE
	let MUTABLE_GLOBAL = "mutable value"
	const GLOBAL_CONSTANT = "immutable value";
	const CONFIG = {
	key: "value",
	};

	// examples of UPPER_SNAKE_CASE convention in nodejs/javascript ecosystem
	// in javascript Math.PI module
	const PI = 3.141592653589793;

	# emoji-data.txt
	# Date: 2019-01-15, 12:10:05 GMT
	# © 2019 Unicode®, Inc.
	# Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the U.S. and other countries.
	# For terms of use, see http://www.unicode.org/terms_of_use.html
	#
	# Emoji Data for UTS #51
	# Version: 12.0
	#
	# For documentation and usage, see http://www.unicode.org/reports/tr51

	var udp = require('dgram');

	// --------------------creating a udp server --------------------

	// creating a udp server
	var server = udp.createSocket('udp4');

	// emits when any error occurs
	server.on('error',function(error){
	console.log('Error: ' + error);



	nearly every Linux distribution comes with systemd, which means forever, monit, PM2, etc. are no longer necessary - your OS already handles these tasks.

	Make a myapp.service file (replacing 'myapp' with your app's name, obviously):

	[Unit]
	Description=My app

	[Service]

Sivabharathy K P gotocva

MEAN Stack Cheat-Sheet

What the heck is MEAN Stack