freeCodeCamp.org

Slow Docker builds can make small code changes take much longer to ship than they should. In this guide, Balajee explains how Docker build cache works, what causes common cache misses, and how to restructure your Dockerfile for faster rebuilds. You'll also learn how to use .dockerignore, multi-stage builds, BuildKit cache mounts, and CI/CD cache backends to cut build times dramatically. freecodecamp.org/news/how-to-op…

Eid Mubarak to everyone around the world who's celebrating!

Today is the Spring Equinox - meaning the sun is directly above the equator and perfectly overhead at noon. For your coding challenge, you'll need to determine how long of a shadow a 4-foot pole casts at a given time. Check it out on the freeCodeCamp mobile app.

A Flutter app can be hard to ship safely when builds, signing, environment configs, and store releases are still manual. In this tutorial, @devseyi helps you build a production-ready Flutter CI/CD pipeline with GitHub Actions. You'll also learn how to distribute tester builds with Firebase and TestFlight, upload Sentry symbols, and automate deployment. freecodecamp.org/news/how-to-bu…

A lot of RAG tutorials work locally, then fall apart when you try to ship them. In this handbook, @dannwaneri teaches you how to build a production RAG system with Cloudflare Workers, Vectorize, and Workers AI. You'll also learn how to handle loading, querying, error handling, and performance while keeping costs low. freecodecamp.org/news/build-a-p…

Automation powers much of modern software development these days. And in this course, you'll learn how CI/CD works in production with Jenkins. It covers the SDLC and branching strategies, pipelines, how to build and deploy a Dockerized app, and lots more. freecodecamp.org/news/ci-cd-in-…

If you're a freelance dev - or want to become one - this podcast interview is for you. Quincy chats with Luke Ciciliano, developer and consultancy owner - who's been freelancing for decades. They talk about how AI can help create more small business customers, how to engage with clients and close a deal, and lots more. freecodecamp.org/news/how-to-la…

Writing clean code helps you build scalable, maintainable software applications. And in this handbook, @shahancd explains what clean code is and why it's important. He also walks you through some helpful coding patterns & discusses comments, naming conventions, functions, project structure, and lots more. freecodecamp.org/news/the-clean…

Machine learning projects aren't over when your model works in a notebook. In this tutorial, Sandeep helps you build an end-to-end ML platform locally with MLflow, Feast, FastAPI, Great Expectations, and Evidently. You'll also learn how to add Docker and GitHub Actions for testing, monitoring, and CI/CD. freecodecamp.org/news/build-end…

For today's coding challenge, you'll invert a matrix. Have you ever done that before? See if you can figure it out on the freeCodeCamp mobile app.

Getting help debugging is easier when you know how to ask a solid technical question. In this guide, Pete teaches you what to include when asking for help, from code and error messages to steps to reproduce and expected vs actual results. You'll also learn how to share minimal reproductions and give other developers the context they need to help you faster. freecodecamp.org/news/how-to-as…

ngrok is useful, but it's no longer the only strong tunneling tool for exposing local services. In this guide, @manishmshiva compares LocalXpose, LocalTunnel, Cloudflare Tunnel, Tailscale, and Boring Proxy. You'll learn which options are a good fit for quick development sharing, secure production access, or self-hosted control. freecodecamp.org/news/top-ngrok…

Kubernetes gets a lot easier to manage when Git becomes the source of truth for your deployments. In this tutorial, Olumoko shows you how to implement GitOps on Kubernetes using Argo CD and GitHub Actions. You'll also learn how to automate image builds, deploy manifests from Git, and keep your cluster synced through self-healing updates. freecodecamp.org/news/how-to-im…

A full-stack app needs a front end + auth, a database, an API, and a reliable way to deploy everything. In this tutorial, @cloud_girl1 teaches you how to build a full-stack CRUD app with React, AWS Lambda, DynamoDB, API Gateway, and Cognito auth. You'll also learn how to use AWS CDK to deploy the backend and CloudFront to ship the frontend over HTTPS. freecodecamp.org/news/full-stac…

Continuous Integration & Continuous Delivery helps you deliver reliable software quickly. These practices and tools are designed to automate the process of integrating, testing, & deploying code changes. In this tutorial, Juan helps you create a basic CI/CD pipeline using Python, Webhooks, and Bitbucket on Linux. freecodecamp.org/news/create-a-…

Many RAG apps look impressive in a demo. But once real users start asking questions, weak retrieval, timeouts, and missing guardrails can cause them to fail in predictable ways. In this tutorial, Chidozie helps you build a beginner-friendly, production-ready RAG app with FastAPI, FAISS, structured outputs, a retrieval gate, & other helpful features. freecodecamp.org/news/build-rag…

For today's coding challenge, you'll get a string of numbers separated by various punctuation. Your job is to return the largest number. See if you can solve it on the freeCodeCamp mobile app.

Self-hosted AI agents give you more control over where your assistant runs and how it works. In this tutorial, @manishmshiva shows you how to deploy your own 24/7 AI agent using OpenClaw on your machine or on a cloud platform. You'll also learn how to interact with it, think about key security concerns, and keep it updated. freecodecamp.org/news/how-to-de…

Testing a full-stack app can be much more complex than some tutorials make it look. So here, @ATechAjay compares manual and AI-assisted approaches to testing a real app with APIs, auth flows, and UI interactions. He also explains when to write tests by hand, when AI tools can help, and what each approach does best. freecodecamp.org/news/how-to-te…