If you are building a home lab in 2026, the most consequential decision you will make is what hardware to run it on. Rack servers are loud, power-hungry, and overkill for most people. A Raspberry Pi cluster is fun but constrained. The sweet spot - and has been for the last couple of years - is the mini PC.

The market has matured. You now have three distinct tiers worth considering: Intel N150 machines for single-purpose appliances, Intel N305 machines for general-purpose home labs, and AMD Ryzen AI class mini PCs for heavy virtualization or local AI inference. Each tier makes sense for a different type of user, and the wrong pick will either leave you frustrated with underpowered hardware or paying for capabilities you will never use.

Pydantic v3 shipped in late 2025. It has a new Rust-backed core and a fresh model system. With FastAPI 0.115+, you get auto request checks, fast JSON output, and OpenAPI 3.1 docs. No manual schema work. Data errors get caught at the API edge. Client SDKs come from the live spec. The check overhead that used to be a bottleneck is now mostly gone.

This guide walks through what changed in v3, how to lay out a production project, the validation patterns to know, and what deployment looks like when you care about speed.

Hardening a Docker image means cutting the attack surface at every layer. Start from a minimal base like distroless or Alpine. Run as a non-root user. Set the filesystem read-only. Drop all Linux capabilities and add back only what the app needs. Pin dependency versions with checksums. Scan images with Trivy or Grype before you push. Each layer of this checklist stands on its own, so you can adopt them one at a time.

If you have ever handed a new team member a README full of “install Node 22, then Python 3.12, then make sure your openssl headers match” instructions, you already know the problem. Nix flakes solve it at the root: instead of documenting what to install, you declare the exact toolchain in a flake.nix file, commit it alongside your code, and every developer runs nix develop to get an identical environment - same compiler, same CLI versions, same system libraries. In 2026, Nix flakes are stable, the Nixpkgs repository holds over 100,000 packages, and the ecosystem around flakes has matured to the point where the learning curve is manageable even for teams with no prior Nix experience.

Run Traefik v3 as a Docker container to build a production-ready stack. It discovers services through Docker labels and handles Let’s Encrypt TLS certificates automatically. You won’t need separate Nginx configs because everything lives in one docker-compose.yml file. This setup gives you a self-managing reverse proxy for multi-service deployments.

Key Takeaways

• Traefik automates service discovery using Docker labels to build routes instantly.
• Native Let’s Encrypt support handles SSL certificates without manual Certbot configuration.
• A built-in web dashboard provides real-time visibility into your routing health.
• Middlewares enable easy setup of security headers, rate limiting, and compression.
• The single-binary architecture handles over 30,000 requests per second on modest hardware.

The current stable release as of early 2026 is Traefik v3.6.x, with v3.7 in early access. All examples in this guide target the v3.x line.

A wildcard SSL cert for *.example.com from Let’s Encrypt covers every one-level subdomain. You get one through the DNS-01 challenge, or, since February 2026, through the new DNS-PERSIST-01 challenge that skips per-renewal DNS edits. One wildcard cert replaces the per-service certs you’d otherwise juggle behind your reverse proxy.

Key Takeaways

• One wildcard cert covers every one-level subdomain under a domain, replacing dozens of per-service certs.
• Only DNS-based challenges (DNS-01 and DNS-PERSIST-01) issue wildcards; HTTP-01 and TLS-ALPN-01 won’t work.
• The newer DNS-PERSIST-01 challenge lets you authorize once and skip DNS edits on every renewal.
• Certbot and acme.sh both automate the DNS challenge through provider-specific plugins or tags.
• Systemd timers handle the 90-day renewal window cleanly, with deploy hooks to reload your reverse proxy.

Why Wildcard Certificates and When You Need Them

If you run three subdomains, single certs work fine. Each one gets its own HTTP-01 challenge, Certbot handles renewal, and life is simple. Once you pass 10 or 15 subdomains, the chore list grows. Every new service needs its own cert request, its own renewal entry, and its own way to break. A wildcard cert folds all of that into one.