Articles on technology, web development, and photography.https://adrian-altner.de/en-ushttps://adrian-altner.de/blog/2026/04/03/forgejo-podman-setup/https://adrian-altner.de/blog/2026/04/03/forgejo-podman-setup/Full setup guide for running Forgejo as a rootless Podman container with Caddy as reverse proxy, systemd integration via Quadlets, and SSH access.Fri, 03 Apr 2026 15:00:00 GMThttps://adrian-altner.de/blog/2026/04/03/initial-vps-setup-debian/https://adrian-altner.de/blog/2026/04/03/initial-vps-setup-debian/First steps after provisioning a fresh Debian VPS — system updates, a non-root user with SSH key auth, unattended upgrades, and hardened SSH config.Fri, 03 Apr 2026 10:00:00 GMThttps://adrian-altner.de/blog/2026/03/26/remark-obsidian-wiki-links/https://adrian-altner.de/blog/2026/03/26/remark-obsidian-wiki-links/How I wrote a small Remark plugin that converts [[wiki-links]] from Obsidian into proper HTML links at build time — without changing how I write in the editor.Thu, 26 Mar 2026 16:00:00 GMThttps://adrian-altner.de/blog/2026/03/24/troubleshooting-mastodon-backfeed-and-stale-webmentions/https://adrian-altner.de/blog/2026/03/24/troubleshooting-mastodon-backfeed-and-stale-webmentions/A practical runbook for common failure modes in Mastodon + Bridgy + webmention.io setups: token scopes, canonical URLs, delayed backfeed, and stale reactions that no longer exist upstream.Tue, 24 Mar 2026 15:05:00 GMThttps://adrian-altner.de/blog/2026/03/24/posse-to-mastodon-with-state-and-media/https://adrian-altner.de/blog/2026/03/24/posse-to-mastodon-with-state-and-media/How Mastodon syndication was added to the deploy pipeline: RSS-based posting for articles and notes, OG image uploads, idempotent state tracking, and rate-limit hardening.Tue, 24 Mar 2026 14:10:00 GMThttps://adrian-altner.de/blog/2026/03/23/webmentions-receiving-and-sending/https://adrian-altner.de/blog/2026/03/23/webmentions-receiving-and-sending/How webmention.io handles incoming mentions and likes, how a build-time component displays them, and how webmention.app sends outgoing notifications after each deploy.Mon, 23 Mar 2026 18:06:00 GMThttps://adrian-altner.de/blog/2026/03/23/syndication-links-from-state/https://adrian-altner.de/blog/2026/03/23/syndication-links-from-state/How .bluesky-posted.json auto-populates u-syndication links on every article and note page — no manual frontmatter required after each post.Mon, 23 Mar 2026 16:22:00 GMThttps://adrian-altner.de/blog/2026/03/23/improving-bluesky-syndication/https://adrian-altner.de/blog/2026/03/23/improving-bluesky-syndication/Extending the syndication script to cover notes, compress OG images before upload, use original publish dates, and persist Bluesky post URLs in the state file.Mon, 23 Mar 2026 14:33:00 GMThttps://adrian-altner.de/blog/2026/03/23/posse-to-bluesky-with-at-protocol/https://adrian-altner.de/blog/2026/03/23/posse-to-bluesky-with-at-protocol/Automatically syndicating new articles to Bluesky after each deploy — fetching the live OG image, uploading it as a blob, and posting a rich link card via the AT Protocol API.Mon, 23 Mar 2026 13:41:00 GMThttps://adrian-altner.de/blog/2026/03/23/microformats2-h-entry-on-astro/https://adrian-altner.de/blog/2026/03/23/microformats2-h-entry-on-astro/How h-entry, h-feed, and the rest of the MF2 vocabulary make articles, notes, and photos machine-readable without changing how they look.Mon, 23 Mar 2026 13:28:00 GMThttps://adrian-altner.de/blog/2026/03/23/joining-the-indieweb/https://adrian-altner.de/blog/2026/03/23/joining-the-indieweb/Why I added IndieWeb support to this site, what it means in practice, and how identity verification works through rel=me and h-card.Mon, 23 Mar 2026 11:42:00 GMThttps://adrian-altner.de/blog/2026/03/23/obfuscating-contact-data-on-a-static-site/https://adrian-altner.de/blog/2026/03/23/obfuscating-contact-data-on-a-static-site/How I protect email addresses and personal contact details on a static Astro site from harvesting bots, using a combination of Base64 obfuscation and a CSS RTL trick that also defends against copy-paste.Mon, 23 Mar 2026 09:29:00 GMThttps://adrian-altner.de/blog/2026/03/23/bridgy-bluesky-backfeed/https://adrian-altner.de/blog/2026/03/23/bridgy-bluesky-backfeed/How Bridgy polls Bluesky for likes, reposts, and replies and sends them back as webmentions — so interactions on the syndicated copy appear on the original post.Mon, 23 Mar 2026 08:21:00 GMThttps://adrian-altner.de/blog/2026/03/23/live-webmentions-hybrid-approach/https://adrian-altner.de/blog/2026/03/23/live-webmentions-hybrid-approach/Upgrading the WebMentions component from build-time-only to a hybrid model: static HTML renders instantly, a silent client-side fetch updates the count without a redeploy.Mon, 23 Mar 2026 07:20:00 GMThttps://adrian-altner.de/blog/2026/03/21/syndicating-photos-to-flickr-with-posse/https://adrian-altner.de/blog/2026/03/21/syndicating-photos-to-flickr-with-posse/How I built a script that keeps Flickr in sync with my site — uploading new photos, deleting removed ones, moving photos between albums, and writing Flickr IDs back into sidecar files.Sat, 21 Mar 2026 17:55:00 GMThttps://adrian-altner.de/blog/2026/03/21/adding-notes-links-and-archives/https://adrian-altner.de/blog/2026/03/21/adding-notes-links-and-archives/Three new content sections built on Astro content collections — short-form notes, a curated link log, and a unified chronological archive.Sat, 21 Mar 2026 13:27:00 GMThttps://adrian-altner.de/blog/2026/03/21/distinguishing-collection-sets-from-category-collections/https://adrian-altner.de/blog/2026/03/21/distinguishing-collection-sets-from-category-collections/A single boolean flag in the frontmatter separates navigational collection nodes from publishable photo sets — keeping the archive clean without adding structural complexity.Sat, 21 Mar 2026 11:09:00 GMThttps://adrian-altner.de/blog/2026/03/21/structuring-photos-as-a-collection-tree/https://adrian-altner.de/blog/2026/03/21/structuring-photos-as-a-collection-tree/How the photos section grew from flat albums into a recursive collection hierarchy with nested routes, breadcrumbs, and a tag browsing system.Sat, 21 Mar 2026 09:31:00 GMThttps://adrian-altner.de/blog/2026/03/19/building-the-photo-stream/https://adrian-altner.de/blog/2026/03/19/building-the-photo-stream/How the photos section works — JSON sidecars from Vision, import.meta.glob, Flickr's justified-layout, and batch loading with IntersectionObserver.Thu, 19 Mar 2026 15:46:00 GMThttps://adrian-altner.de/blog/2026/03/19/migrating-vision-script-from-openai-to-claude/https://adrian-altner.de/blog/2026/03/19/migrating-vision-script-from-openai-to-claude/How scripts/vision.ts was rewritten to use the Anthropic SDK with claude-opus-4-6 and tool use instead of OpenAI's json_schema response format.Thu, 19 Mar 2026 11:00:00 GMThttps://adrian-altner.de/blog/2026/03/19/photo-albums-with-astro-content-layer/https://adrian-altner.de/blog/2026/03/19/photo-albums-with-astro-content-layer/How the albums section is structured — from content collection to justified grid, album-scoped photo routes, and a sub-nav to switch between stream and albums.Thu, 19 Mar 2026 08:23:00 GMThttps://adrian-altner.de/blog/2026/03/15/vision-rate-limit-runbook-for-photo-sidecars/https://adrian-altner.de/blog/2026/03/15/vision-rate-limit-runbook-for-photo-sidecars/A practical checklist for running scripts/vision.ts on larger photo batches without failing on 429 TPM limits.Sun, 15 Mar 2026 07:49:00 GMThttps://adrian-altner.de/blog/2026/03/14/generating-photo-sidecars-locally-before-vps-deploy/https://adrian-altner.de/blog/2026/03/14/generating-photo-sidecars-locally-before-vps-deploy/How to run Vision metadata generation against an Obsidian photo library locally and sync the generated JSON sidecars to a VPS.Sat, 14 Mar 2026 20:12:00 GMThttps://adrian-altner.de/blog/2026/03/11/obsidian-to-vps-pipeline-with-sync-pull-and-redeploy/https://adrian-altner.de/blog/2026/03/11/obsidian-to-vps-pipeline-with-sync-pull-and-redeploy/A complete one-command publishing pipeline from Obsidian on macOS to a live Astro site on a VPS.Wed, 11 Mar 2026 17:15:00 GMThttps://adrian-altner.de/blog/2026/03/05/triggering-vps-deploys-with-github-actions/https://adrian-altner.de/blog/2026/03/05/triggering-vps-deploys-with-github-actions/How to trigger a Podman-based VPS deploy automatically after pushing to main.Thu, 05 Mar 2026 13:38:00 GMThttps://adrian-altner.de/blog/2026/03/05/github-to-codeberg-mirror-without-third-party-action/https://adrian-altner.de/blog/2026/03/05/github-to-codeberg-mirror-without-third-party-action/A clean repository mirroring setup from GitHub to Codeberg using native GitHub Actions and SSH.Thu, 05 Mar 2026 07:53:00 GMThttps://adrian-altner.de/blog/2026/03/04/installing-podman-locally-and-on-a-vps/https://adrian-altner.de/blog/2026/03/04/installing-podman-locally-and-on-a-vps/A practical install guide for Podman on macOS and Debian/Ubuntu servers, including first-run checks.Wed, 04 Mar 2026 20:51:00 GMThttps://adrian-altner.de/blog/2026/03/04/github-ssh-on-vps-for-deploys/https://adrian-altner.de/blog/2026/03/04/github-ssh-on-vps-for-deploys/How to set up a stable SSH-based Git connection on a VPS for pull-based deployments.Wed, 04 Mar 2026 18:09:00 GMThttps://adrian-altner.de/blog/2026/03/04/keeping-the-website-running-after-a-vps-reboot/https://adrian-altner.de/blog/2026/03/04/keeping-the-website-running-after-a-vps-reboot/How to ensure your Podman-hosted website comes back automatically after a server restart.Wed, 04 Mar 2026 15:50:00 GMThttps://adrian-altner.de/blog/2026/03/04/operating-astro-ssr-in-production-with-podman/https://adrian-altner.de/blog/2026/03/04/operating-astro-ssr-in-production-with-podman/A compact day-two operations runbook: start, stop, logs, deploy updates, and rollback strategy.Wed, 04 Mar 2026 13:32:00 GMThttps://adrian-altner.de/blog/2026/03/04/updating-the-website-repository-on-a-vps/https://adrian-altner.de/blog/2026/03/04/updating-the-website-repository-on-a-vps/A repeatable update flow for pulling the latest website code on a VPS and redeploying safely.Wed, 04 Mar 2026 11:44:00 GMThttps://adrian-altner.de/blog/2026/03/03/caddy-for-astro-podman-https-and-canonical-host/https://adrian-altner.de/blog/2026/03/03/caddy-for-astro-podman-https-and-canonical-host/How to put Caddy in front of a Podman-hosted Astro SSR app with automatic TLS and www redirect.Tue, 03 Mar 2026 14:53:00 GMThttps://adrian-altner.de/blog/2026/03/02/deploying-astro-ssr-to-vps-with-podman/https://adrian-altner.de/blog/2026/03/02/deploying-astro-ssr-to-vps-with-podman/A practical VPS deployment flow for Astro SSR using Podman and podman-compose.Mon, 02 Mar 2026 10:24:00 GMThttps://adrian-altner.de/blog/2026/03/01/astro-ssr-with-podman/https://adrian-altner.de/blog/2026/03/01/astro-ssr-with-podman/A complete local setup for running an Astro SSR site in Podman with the Node standalone adapter.Sun, 01 Mar 2026 17:57:00 GMThttps://adrian-altner.de/blog/2025/12/01/hello-world/https://adrian-altner.de/blog/2025/12/01/hello-world/Saying hello in the world of coding.Mon, 01 Dec 2025 07:50:00 GMT