freecodecamp.orgTop Heroku Alternatives for Deployment in 2026For more than a decade, Heroku defined what “developer-friendly deployment” meant. Push code, forget servers, and focus on shipping features. That promise shaped an entire generation of platform-as-a-service products. In 2026, that landscape is chang...Feb 11·6 min read
freecodecamp.orgHow to Dockerize Your Application and Deploy ItModern applications rarely live in isolation. They move between laptops, staging servers, and production environments. Each environment has its own quirks, missing libraries, or slightly different configurations. This is where many “works on my machi...Feb 5·6 min read
freecodecamp.orgHow to Build and Deploy a LogAnalyzer Agent using LangChainModern systems generate huge volumes of logs. Application logs, server logs, and infrastructure logs often contain the first clues when something breaks. The problem is not a lack of data, but the effort required to read and understand it. Engineers ...Feb 4·8 min read
freecodecamp.orgHow to Chat with Your PDF Using Retrieval Augmented GenerationLarge language models are good at answering questions, but they have one big limitation: they don’t know what is inside your private documents. If you upload a PDF like a company policy, research paper, or contract, the model cannot magically read i...Jan 27·7 min read
freecodecamp.orgHow to Work with PDF Files in Python: A PyPDF GuidePDF files are everywhere. They’re used for reports, invoices, bank statements, research papers, and legal documents. While PDFs are easy to read for humans, they’re not easy to work with in code. Extracting text, splitting pages, or merging files oft...Jan 23·6 min read
