Learn how to create an interactive face-tracking effect using AI-generated images. This tutorial covers generating face variations with the fofr/expression-editor model on Replicate, building a Node.js script to automate image generation, and implementing smooth cursor and device motion tracking in the browser using vanilla HTML, CSS, and JavaScript.

Transform your Markdown blog posts into engaging, conversational podcasts using OpenAI’s Agents SDK. Discover how to automate every step - from scriptwriting and editing to voice generation - to produce natural-sounding MP3 episodes in minutes. Build your own AI-powered production pipeline and give your blog a real voice, no studio or audio expertise required.

A clean and scalable way to structure your Nest.js project for microservices. This step-by-step guide helps you organise multiple apps and shared libraries for a scalable architecture. Perfect for developers who want a maintainable, modular, and production-ready backend foundation with Nest.js.

Turn your Nest.js app into a distributed microservice system. Discover how message queues and shared libraries help create a loosely coupled backend. Each service handles its own responsibility, from order creation to persistence and notifications, without waiting on others. This approach makes your backend more resilient, fault-tolerant, and ready for real-world workloads.

Build your own AI search engine with Next.js, SQLite, and free open-source LLMs. This tutorial guides you through implementing Retrieval-Augmented Generation (RAG) for accurate, context-aware search, bypassing costly APIs. Discover how to leverage local models and vector databases for powerful, privacy-focused search results.

Learn how to build a free AI-powered recommendation engine using open-source embedding models from Hugging Face and Transformer.js. This step-by-step guide will show you how to generate text embeddings, compare article similarities, and create personalised content suggestions—without relying on paid APIs.

If you have used Nest.js recently probably have realised that the class-validator library has a high vulnerability in it, which is not being addressed for quite a while. The ValidationPipe makes use of the powerful class-validator package and its declarative validation decorators. The ValidationPipe provides a convenient approach to enforce validation rules for all incoming client payloads, where the specific rules are declared with simple annotations in local class/DTO declarations in each module. The class-validator package works in conjunction with another package class-transformer. The lack of maintenance made the Nuxt team fork the original packages and take care of the maintenance.

This blog article is a continuation from the previous blog article about Nest.js Authorisation with Firebase Auth. If you have’t read that article you will not be able to follow along. The previous article can be found below. In this article we will be using custom route decorators in Nest. We will be creating our own @CurrentUser decorator and use it in the module controllers anytime we want to get the current logged user. Let’s have a look at how we can achieve this.

In this blog article we will be creating a Nest application where users (with different roles) can sign-up and sign-in to the application. Specific permissions can be configured for each user access to specific endpoints, based on the user role. We are going to use Firebase Auth to help us with user Authentication and Authorisation. Before we continue let’s first install the Nest CLI. That will help us create our project much quicker. To install Nest CLI globally use the following command in your terminal

In this blog article we will be creating a Nest application where users (with different roles) can sign-up and sign-in to the application. Specific permissions can be configured for each user access to specific endpoints, based on the user role. We are going to use Okta to help us with user Authentication and Authorisation. Okta is an Identity as a Service (IDaaS). This is a cloud-based authentication or identity management subscription service. Okta can be used for a number of different applications such as Adaptive multi-factor authentication, single sign-on, Universal Directory etc. Nest is a progressive Node.js framework for building efficient, reliable and scalable server-side applications with TypeScript.