Eric Evans’s big blue book in one article: ubiquitous language, bounded contexts and tactical building blocks - and why it’s the strategic half that pays off.
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A fake SMTP server with a real inbox: Mailpit captures your app’s e-mails instead of delivering them. Configuration on the Java and Python side, verification by hand and then in CI thanks to its REST API.
depends_on alone is not enough - healthchecks change everything: a tour of the Compose tricks that make a dev stack reliable - startup order, profiles, overrides and the !override tag, include, YAML anchors, watch mode, lifecycle hooks, parallel stacks, and tmpfs test databases.
Layer ordering, .dockerignore, multi-stage builds, cache mounts, non-root users: the techniques that turn a naive Dockerfile into a lightweight image, fast to rebuild and sound in production.
A Java stacktrace is 40 lines long; misconfigured, Filebeat turns it into 40 unusable documents. A step-by-step multiline configuration, with a test application that generates real stacktraces, all the way to complete, queryable Elasticsearch documents.
Everything you need to tag your releases with confidence: annotated vs lightweight tags, the commands that matter, and why git push silently ignores your tags.
Essential Vim commands for daily use - modes, motions, editing, macros - plus the power techniques (visual block, :g, dot-repeat) that make it all click.