Practical sharp recipes from a publishing pipeline: resizing a generated image to the exact sizes stores require, extracting a region to remove a border, compositing an SVG overlay with text and gradients, and JPEG settings that keep web images small without visible loss.
Use the Chrome binary you already have to turn an HTML file into a print-ready PDF or a pixel-exact PNG, without installing Puppeteer: the flags, a throwaway user-data-dir so you never touch the real profile, @page CSS for A5 books, page-break rules, and the file URL escaping that bites on Windows.
Git Bash tools on Windows read files in text mode and hide carriage returns, so grep reports zero CRLFs in a CRLF file and string replacements that span lines never match. How to detect line endings reliably with Node, and a read-normalise-replace-restore pattern that keeps files consistent.
Generate a valid EPUB 3 from a folder of Markdown chapters using marked and jszip: the required files, why mimetype must be stored uncompressed and first, converting HTML to XHTML, the nav.xhtml table of contents, content.opf metadata, and adding a cover.
A minimal, production-ready way to run an Express app on Cloud Run: the Dockerfile, reading PORT, a deploy script in package.json, scaling to zero with a small memory limit, and the mistakes that cost the first hour.