business-ai
Turning HTML-Only Email Receipts into PDFs with Headless Chromium
Many receipts are HTML mails without attachment. Render them to PDF with Playwright, and dodge the Gmail label gotcha that reprocesses a thread forever.
Docker
Docker in practice: installs, compose stacks, reverse proxies, monitoring and what breaks when panels and firewalls interfere.
Docker
My Hosting Panel's Firewall Kept Wiping Docker's iptables Chains
KeyHelp loads its firewall with iptables-restore and flushes Docker's chains. How to spot it, the quick fix, and the options to make it stick.
Docker
Apache as a Reverse Proxy for Docker Apps (and the Panel Trap)
Put Docker apps behind Apache: ProxyPass, ProxyPreserveHost, X-Forwarded-Proto, WebSockets, localhost-only ports, and why a panel gives you 302/404.
Docker
Rebuilding My Ghost Blog After the Database Was Gone
My Ghost container ran outside the hosting panel, so the panel backup had none of it. How I rebuilt the blog from Markdown sources and what I verified.
business-ai
My AI Assistant "Stopped Answering" — It Was Missing Three apt Packages
A self-hosted AI assistant went silent on a document request. Not the model, not permissions: poppler, ImageMagick and Ghostscript were missing.
Linux
The Idempotency Bug That Uploaded the Same File 153 Times
A cron job re-ran a side effect every two minutes because its "done" marker was gated on a flaky downstream step. The fix is one line moved up. Here's the pattern.
Linux
Grafana vs Netdata vs Uptime Kuma — I Run All Three, Here's What Each Is Actually For
Honest comparison of Prometheus+Grafana, Netdata and Uptime Kuma — what each one is good at, what it costs you, and why running all three is a reasonable answer.
Hytale
Running a Hytale Server in Docker With a Web Panel (and Ditching My systemd Unit)
Move a Hytale server from a bare systemd unit into Docker behind a web panel — container layout, UDP ports, console access, and keeping systemd as a fallback.
Docker
Docker vs Podman — What's the Difference and Should You Switch?
Docker vs Podman compared — daemon vs daemonless, rootless security, systemd/Quadlet integration, compose support, and when switching is actually worth it.
Docker
Coolify vs Dokploy vs CapRover — Self-Hosted PaaS Compared (2026)
Coolify vs Dokploy vs CapRover compared — architecture, proxy, git deploys, multi-server, and which self-hosted Heroku alternative to pick for your stack.
Docker
Coolify — Self-Hosted PaaS, and the Cheats I Wish I'd Known
Run Coolify as your own Heroku — install, deploy apps and docker-compose services, automatic HTTPS, plus the API, sslip testing and path-routing cheats.
Docker
A Prometheus + Grafana Monitoring Stack in Docker
Stand up Prometheus, Grafana and node_exporter with Docker Compose — real scrape config, node metrics, a dashboard, and alert rules that actually fire.