AIMRAN Blog https://blog.aimran.es/en/ Official blog of the AIMRAN ecosystem: practical guides on web development, artificial intelligence, developer tools, SEO and technology, by Aimran. en Tue, 06 Oct 2026 00:00:00 GMT Canonical and hreflang: how to implement them properly (and the mistakes that cancel them) https://blog.aimran.es/en/articles/canonical-and-hreflang-how-to-implement/ https://blog.aimran.es/en/articles/canonical-and-hreflang-how-to-implement/ What the canonical tag does, what hreflang does, how to combine them on a multilingual site with x-default, and the mistakes that make Google ignore them. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham SEO Docker: the difference between an image and a container, explained with commands https://blog.aimran.es/en/articles/docker-image-vs-container/ https://blog.aimran.es/en/articles/docker-image-vs-container/ What a Docker image is, what a container is and how they relate, with the basic commands to create, list, stop and remove each one, plus the most frequent mistakes. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development How to undo the last commit in Git without losing work https://blog.aimran.es/en/articles/git-undo-last-commit/ https://blog.aimran.es/en/articles/git-undo-last-commit/ How to undo the last commit in Git with reset, revert and amend, which one to use when the commit is already pushed, and how to recover a commit you thought lost. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development How a language model works: tokens, context window and temperature https://blog.aimran.es/en/articles/how-language-models-work-tokens-context-temperature/ https://blog.aimran.es/en/articles/how-language-models-work-tokens-context-temperature/ What a token is, what the context window limits, what temperature does and why language models are confidently wrong. Explained for developers, no maths. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Artificial intelligence How to convert images to WebP (and when not to) https://blog.aimran.es/en/articles/how-to-convert-images-to-webp/ https://blog.aimran.es/en/articles/how-to-convert-images-to-webp/ What WebP is, how much it saves over JPEG and PNG, how to convert images in the browser, the terminal or Node.js, and how to serve them with picture. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development How to count the tokens in a prompt and estimate what a call to a language model costs https://blog.aimran.es/en/articles/how-to-count-tokens-and-estimate-prompt-cost/ https://blog.aimran.es/en/articles/how-to-count-tokens-and-estimate-prompt-cost/ Why models charge per token, how to count tokens exactly for GPT and approximately for Claude, and how to cut the cost of each call without losing quality. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Artificial intelligence How to read and write a cron expression (with examples you can copy) https://blog.aimran.es/en/articles/how-to-read-and-write-a-cron-expression/ https://blog.aimran.es/en/articles/how-to-read-and-write-a-cron-expression/ What each of the five fields of a cron expression means, what *, comma, hyphen and slash do, the mistakes that confuse most people and ready-made examples to copy. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Developer tools How to validate JSON and understand its most common errors https://blog.aimran.es/en/articles/how-to-validate-json-common-errors/ https://blog.aimran.es/en/articles/how-to-validate-json-common-errors/ JSON syntax rules according to the standard, the five mistakes behind almost every parse failure, and how to validate a file in the browser, terminal or Node.js. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Developer tools HTTP security headers: which ones to set on any website and what each does https://blog.aimran.es/en/articles/http-security-headers/ https://blog.aimran.es/en/articles/http-security-headers/ What HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy and Permissions-Policy do, with recommended values and checks. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Technology Lazy loading images in HTML: loading="lazy", fetchpriority and decoding https://blog.aimran.es/en/articles/lazy-loading-images-in-html/ https://blog.aimran.es/en/articles/lazy-loading-images-in-html/ How to enable deferred image loading with loading="lazy", why you must not apply it to the main image, and how to combine it with fetchpriority and decoding. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development robots.txt versus noindex: what each one does and when to use them https://blog.aimran.es/en/articles/robots-txt-vs-noindex/ https://blog.aimran.es/en/articles/robots-txt-vs-noindex/ robots.txt controls crawling and noindex controls indexing. What happens when you combine them badly, how to handle internal search and filters, and how to check it. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham SEO WCAG colour contrast: how it is calculated, which ratios it requires and how to meet them https://blog.aimran.es/en/articles/wcag-colour-contrast-how-to-calculate-and-meet-it/ https://blog.aimran.es/en/articles/wcag-colour-contrast-how-to-calculate-and-meet-it/ What the contrast ratio is, how it is calculated from luminance, what levels AA and AAA require, how to measure it and the design mistakes that fail it. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development What are the Core Web Vitals: LCP, INP and CLS explained with thresholds https://blog.aimran.es/en/articles/what-are-core-web-vitals/ https://blog.aimran.es/en/articles/what-are-core-web-vitals/ What LCP, INP and CLS measure, which thresholds Google uses to call them good, how they are assessed with real user data and what usually breaks each metric. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham SEO What a JWT is, what is inside it and why decoding it is not validating it https://blog.aimran.es/en/articles/what-is-a-jwt-decoding-is-not-validating/ https://blog.aimran.es/en/articles/what-is-a-jwt-decoding-is-not-validating/ Anatomy of a JSON Web Token (header, payload and signature), which claims it carries, how to read it, the common security mistakes and where to store it. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Technology What an AI agent is and how it differs from a chatbot https://blog.aimran.es/en/articles/what-is-an-ai-agent/ https://blog.aimran.es/en/articles/what-is-an-ai-agent/ An AI agent combines a language model with tools and a decision loop to complete tasks. How it differs from a chatbot, how it works, its risks and when to use one. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Artificial intelligence What Base64 is, when to use it and how to encode in JavaScript, Node and the terminal https://blog.aimran.es/en/articles/what-is-base64/ https://blog.aimran.es/en/articles/what-is-base64/ Base64 turns binary data into text so it can travel safely. What it is, how much it grows the size, how to encode in JavaScript, Node.js and the terminal. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Developer tools What DNS is and what A, AAAA, CNAME, MX and TXT records are for https://blog.aimran.es/en/articles/what-is-dns-a-cname-mx-txt-records/ https://blog.aimran.es/en/articles/what-is-dns-a-cname-mx-txt-records/ How DNS turns a domain into an IP address, what each record type does, what TTL and “propagation” are, and how to check your domain’s configuration with dig. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Technology Which favicon sizes a website needs today (and which ones it no longer does) https://blog.aimran.es/en/articles/which-favicon-sizes-does-a-website-need/ https://blog.aimran.es/en/articles/which-favicon-sizes-does-a-website-need/ The five favicon files needed in 2026 (ICO, SVG, apple-touch-icon and manifest icons), what Google requires to show it in results and which tags go in the head. Tue, 06 Oct 2026 00:00:00 GMT Aimran Oukham Web development