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How to restrict API access to our backend

Here are several approaches to restrict API access to our frontend:

CORS Policy Configuration:

import cors from '@fastify/cors';

fastify.register(cors, {

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How to structure NodeJS project

Possible structures:

File structure

1. Domain-Driven Structure:

src/
├── domains/

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Binary Search Task

Task: We have an array sorted in ascending order:

a = [ 3, 4, 6, 9, 10, 12, 14, 15, 17, 19, 21 ]; Define a function f(a, x) that would return x, the nearest smallest number, or -1 on error.

Example:

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Task

console.log '1' after 1 second,
'2' after 2 seconds and
'3' after 3 seconds after start of the program.

setTimeout

The delay parameter only guarantees that your callback will not execute before that time has elapsed. Other queued tasks or operations could delay it further than the specified time.

const startTime = process.hrtime();

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How to start MongoDB and Mongo Express with docker compose

We use mongo:4.4.6 because of Error: MongoDB 5.0+ requires a CPU with AVX support. Container failed to start Solution from here: https://stackoverflow.com/questions/70818543/mongo-db-deployment-not-working-in-kubernetes-because-processor-doesnt-have-avx You may be can use mongo:latest

docker-compose.yml

version: "3.8"

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Generate a UUID in the browser

const url = URL.createObjectURL(new Blob());
const UUID = url.substring(url.lastIndexOf('/') + 1);

https://medium.com/teads-engineering/generating-uuids-at-scale-on-the-web-2877f529d2a2

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Delete last commit from git

First way

git reset --hard HEAD~1
git push --force

Another way