Best of Docker — March 2026

  1. 1
    Article
    Avatar of rubyflowRuby Flow·8w

    Why I Stopped Using Docker in Development

    A solo Rails developer argues that Docker in local development is unnecessary overhead for individual developers, citing Mac file system latency (0.5s vs 4s test startup), excessive RAM usage (2GB+ vs ~200MB), and the irrelevance of environment parity when you're the only developer. The proposed native alternative uses Mise for version management, Postgres.app, Redis via Homebrew, and Overmind for process management. Docker is still recommended for deployment via Kamal, treating containers as a packaging format rather than a development environment.

  2. 2
    Article
    Avatar of dailydaily.dev·5w

    We built an org-wide AI agent in 4 days. Here's what broke in the weeks after.

    daily.dev built 'Smith', a 29K-line TypeScript AI agent integrated into their Slack workspace in just 4 days using Codex. The post covers the production incidents and security challenges that followed: credential leaks in a shared runtime requiring a growing command sanitizer, GitHub token bleeding between user sessions, a Node.js event-loop hang that systemd couldn't detect (fixed with a watchdog + health checks), memory exhaustion from a power user's long conversations (fixed with cgroup limits), and a progressive tool disclosure system to manage 60+ tools. Smith self-authors its own reusable skills via a git-backed 'brain' repo and now runs autonomous nightly tasks like spam sweeps and A/B experiment audits. Known remaining issues include an unaudited skill brain, incomplete command sanitizer, and an unsolved crash pattern from one heavy user.

  3. 3
    Article
    Avatar of freecodecampfreeCodeCamp·7w

    CI/CD in Production with Jenkins

    A 17-hour Jenkins course covering CI/CD from fundamentals to production-grade DevSecOps has been released on freeCodeCamp's YouTube channel. Topics include modern SDLC, CI/CD concepts, branching strategies, Jenkins basics and installation, freestyle jobs, pipelines, multibranch pipelines, Maven for DevOps, DevSecOps, and Jenkins shared libraries. A hands-on project builds and deploys a Dockerized Flask app.

  4. 4
    Article
    Avatar of hnHacker News·6w

    GitHub - hectorvent/floci: Light, fluffy, and always free - AWS Local Emulator

    Floci is a free, open-source local AWS emulator designed as a drop-in replacement for LocalStack Community Edition, which is sunsetting its free tier in March 2026. It requires no auth token, supports unlimited CI/CD usage, and starts in ~24ms with ~13 MiB idle memory. The Docker image is ~90 MB versus LocalStack's ~1 GB. Floci supports 20+ AWS services including API Gateway v2, Cognito, ElastiCache, RDS with IAM auth, DynamoDB Streams, and more — with 408/408 SDK tests passing. Setup is a single `docker compose up` and SDK integration requires only pointing the endpoint to localhost:4566.

  5. 5
    Article
    Avatar of selfhstselfh.st·7w

    Self-Host Weekly (13 March 2026)

    Weekly self-hosting newsletter covering community drama around Booklore and ntfy's AI-assisted v2.18 release, TrueNAS closing its build system source, and the trend of 'claw'-named projects. Also spotlights Open DroneLog, a self-hosted drone flight log platform deployable via Docker, plus curated videos, a CLI tip for mkdir -p, and miscellaneous homelab news.

  6. 6
    Article
    Avatar of collectionsCollections·8w

    JetBrains Air is now in public preview: an IDE built around AI agents rather than the editor

    JetBrains has launched two AI-focused developer tools. Air is an agentic development environment (public preview, macOS only) built on the abandoned Fleet IDE codebase, designed to orchestrate multiple AI agents — including OpenAI Codex, Claude, Gemini, and JetBrains' own Junie — concurrently in isolated sessions. It uses the open Agent Client Protocol (ACP) for vendor-neutral agent communication and bundles terminal, Git, code navigation, and preview in one workspace. Junie CLI is a standalone, LLM-agnostic coding agent for terminals, IDEs, and CI/CD pipelines, supporting models from OpenAI, Anthropic, Google, and Grok via bring-your-own-key. It emphasizes codebase structural understanding to avoid what JetBrains calls 'Shadow Tech Debt,' and includes next-task prediction, MCP support, and one-click migration from Claude Code and Codex. Pricing starts at $10/month. JetBrains positions both tools as neutral infrastructure beneath existing agents rather than direct competitors.

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    Video
    Avatar of codinggopherThe Coding Gopher·5w

    99% of Developers Don't Get Docker

    A deep dive into how Docker actually works under the hood, covering the evolution from hardware virtualization (VMs with hypervisors) to OS-level containerization. Explains the Linux kernel primitives that make containers possible: namespaces (PID, net, mnt, UTS) for isolation and cgroups for resource limits. Covers the union file system and copy-on-write strategy that makes images lightweight and fast. Also walks through Dockerfile optimization via layer caching, data persistence with volumes, and briefly compares Docker Swarm vs Kubernetes for orchestration and Docker vs Podman architecturally.

  8. 8
    Article
    Avatar of kentcdoddsKent C. Dodds·7w

    Migrating to Workspaces and Nx

    Kent C. Dodds shares his experience migrating kentcdodds.com from an informal multi-package repo to a proper npm workspaces monorepo with Nx. The repo already had multiple deployable services (a React Router site, OAuth worker, audio worker, and Docker container), but each had its own lockfile and no shared workspace structure. The migration moved all services under services/*, consolidated lockfiles, and added minimal Nx config for caching. Three notable breakages emerged: Node rejecting package import aliases that pointed outside the new package boundary, production going down because hardcoded GitHub API content paths didn't reflect the new directory structure, and Docker stages missing Prisma schema files. CI was also restructured to install only per-service dependencies. The key takeaway: structural refactors expose hidden assumptions, and AI coding agents should be made to prove correctness rather than just claim confidence.

  9. 9
    Article
    Avatar of freecodecampfreeCodeCamp·8w

    How to Use Docker Compose for Production Workloads — with Profiles, Watch Mode, and GPU Support

    Docker Compose has evolved significantly in 2024-2025 with features that make it viable for complex deployment scenarios beyond local development. Key improvements covered include: profiles for managing multiple environments from a single file, watch mode for instant file syncing without rebuilds, GPU passthrough for ML inference workloads, proper health checks with dependency conditions to eliminate startup race conditions, and Docker Bake integration for production image builds. The guide provides practical configuration examples for each feature, a week-by-week adoption path, and an honest assessment of where Compose still falls short compared to Kubernetes or full orchestration platforms.

  10. 10
    Video
    Avatar of christianlempaChristian Lempa·8w

    Uptime Kuma v2 is HERE // Breaking Changes & Safe Upgrade Checklist

    Uptime Kuma v2 introduces MariaDB support, Docker secret support, new image tags, and deprecates the 'latest' Docker tag. The upgrade requires backing up the data volume before migrating, as the internal database schema changes and migration can take several minutes for large datasets. For those wanting to switch from SQLite to MariaDB, the process involves exporting the SQLite database, converting it using the sqlite3-to-mysql tool, and importing into a MariaDB container. The 'latest' Docker tag is now deprecated and users must explicitly pin to v2. Alpine-based images are also dropped in v2.

  11. 11
    Article
    Avatar of selfhstselfh.st·6w

    Self-Host Weekly (20 March 2026)

    A weekly self-hosting newsletter covering the growing problem of AI-generated pull requests overwhelming open source project maintainers, Unraid v7.3.0 entering beta with support for non-flash-drive installation, a satirical site called Malus mocking AI-driven open source relicensing, and a spotlight on Sure — a self-hosted personal finance platform forked from Maybe that supports account linking, budgeting, investment tracking, and LLM-powered AI chat, deployable via Docker with PostgreSQL and Redis.

  12. 12
    Article
    Avatar of selfhstselfh.st·8w

    Self-Host Weekly (6 March 2026)

    Weekly roundup covering self-hosted software news and community highlights. Notable items include Microsoft banning 'microslop' on Discord, rumors of a subscription-based Windows 12, OpenAI building an internal GitHub alternative, OpenClaw surpassing React as GitHub's most-starred project, Anthropic launching a Claude for Open Source program, a Home Assistant integration to play DOOM from dashboards, and Ente announcing Ensu, an offline privacy-focused LLM app. The content spotlight features Versity S3 Gateway, a lightweight self-hosted bridge for accessing local filesystems via object storage APIs, deployable via Docker. Also includes curated videos on Cloudflare Tunnels, Home Assistant 2026.3, and Dokploy vs Coolify.

  13. 13
    Article
    Avatar of hnHacker News·5w

    NanoClaw Adopts OneCLI Agent Vault

    NanoClaw is integrating OneCLI's Agent Vault as its default credential and proxying layer for AI agents. Instead of agents holding raw API keys, the vault proxies outbound requests, injects credentials at the gateway level, and enforces policy rules like rate limits. This addresses a real risk illustrated by a Meta AI director's incident where an agent mass-deleted emails despite explicit instructions not to act autonomously. The integration combines NanoClaw's Docker-based runtime isolation with OneCLI's credential isolation and policy enforcement, giving users fine-grained control over what agents can access, how often, and with human-in-the-loop approval flows on the roadmap. Both projects are open source.

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