blog: Add roundup of bootc talks from DevConf.CZ and Flock 2026

Both conferences took place in the Czech Republic in June 2026 and
featured numerous bootc-related talks.  The DevConf.CZ talks have
individual YouTube recordings; the Flock sessions were captured as
room-level livestreams with schedule links to slides and resources.

Assisted-by: opencode (claude-opus-4-6)
Signed-off-by: Colin Walters <walters@verbum.org>

Author: cgwalters

config.toml

@@ -69,5 +69,8 @@ footer = ""
 # Use the key (e.g., "jeckersb") as the author value in blog post frontmatter
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+[extra.authors.cgwalters]
+name = "Colin Walters"
+
 [extra.authors.jeckersb]
 name = "John Eckersberg"

content/blog/2026-jul-07-conference-talks-devconf-flock-2026.md

@@ -0,0 +1,86 @@
++++
+title = "bootc ecosystem at DevConf.CZ and Flock to Fedora 2026"
+date = 2026-07-07
+slug = "2026-jul-07-conference-talks-devconf-flock-2026"
+
+[extra]
+author = "cgwalters"
++++
+
+# bootc ecosystem at DevConf.CZ and Flock to Fedora 2026
+
+June was a busy month for the bootc community, with back-to-back
+conferences in the Czech Republic: [Flock to
+Fedora](https://fedoraproject.org/flock/2026/) (June 14-16, Prague)
+and [DevConf.CZ](https://www.devconf.info/cz/) (June 18-19, Brno).
+Both featured a strong presence of talks covering bootc, image-mode
+systems, and the broader ecosystem.  Here's a roundup of the
+recordings and resources.
+
+## DevConf.CZ 2026
+
+The [full DevConf.CZ 2026 schedule](https://pretalx.devconf.info/devconf-cz-2026/schedule/)
+(including slides) is available on pretalx.  Individual talk recordings
+are on the [DevConf YouTube channel](https://www.youtube.com/channel/UCmYAQDZIQGm_kPvemBc_qwg).
+
+[**Hardening OS Distribution: Verifiable and sealed OS with bootc and composefs**](https://www.youtube.com/watch?v=voB5oUDQ3FE)
+(Colin Walters, 35 min) — Covers the shift toward OCI-native OS
+delivery using bootc and composefs, including a demo of deploying a
+sealed UKI composefs-backed system on RHEL 10.2.  Related to the
+[sealed images blog series](@/blog/2026-may-04-sealed-images-security-chain.md)
+here on bootc.dev.
+
+[**These bootc are made for mailin'**](https://www.youtube.com/watch?v=zfXQViQpS3s)
+(Michael Scherer, 36 min) — A practical walkthrough of combining bootc
+and Fedora Image Mode with the Stalwart mail server for a low-maintenance,
+self-hosted email stack running on the cheapest possible VM.
+
+[**Local package layering on bootc systems with DNF5**](https://www.youtube.com/watch?v=0eNZOVVTkEI)
+(Evan Goode, 26 min) — Explores the challenge of making `dnf install`
+work on immutable bootc systems, introducing `dnf rebuild`, a new DNF5
+plugin that reconciles imperative package management with declarative
+container workflows.
+
+[**Foreman, Katello and bootable containers**](https://www.youtube.com/watch?v=2MIor88lO8M)
+(Adam Růžička, 35 min) — How Foreman and Katello enable fleet
+management across both traditional package-mode and the new image-mode
+approach, from image building through operational management.
+
+[**Applying CI/CD Patterns to Image Mode for RHEL**](https://www.youtube.com/watch?v=htpPxxaHeXY)
+(Alessandro Rossi, 27 min) — Practical examples of applying CI/CD
+practices to Image Mode for RHEL using Tekton, GitHub Actions, GitLab
+CI, Jenkins, and Ansible Automation Platform.
+
+## Flock to Fedora 2026
+
+Flock sessions were recorded as room-level livestreams on the
+[Fedora Project YouTube channel](https://www.youtube.com/c/FedoraProject).
+Individual talk pages on the
+[Flock schedule](https://cfp.fedoraproject.org/flock-to-fedora-2026/schedule/)
+link to slides and other resources.
+
+[**The Future of Fedora Atomic: Unifying on Bootc and Shared Infrastructure**](https://cfp.fedoraproject.org/flock-to-fedora-2026/talk/M87M8M/)
+(Hristo Marinov, BoF, 1h40) — A collaborative session discussing the
+roadmap for migrating Fedora Atomic deliverables (Silverblue, CoreOS,
+etc.) to a bootc-based workflow, covering architectural shifts and
+build infrastructure changes.
+
+[**Fedora bootc: Building and Operating Image-Based Systems**](https://cfp.fedoraproject.org/flock-to-fedora-2026/talk/3PHYFQ/)
+(Gursewak Mangat, 25 min;
+[slides](https://fedoraproject.org/w/uploads/f/f6/BootcInFedoraSlides.pdf))
+— A practical introduction to bootc for Fedora contributors,
+demonstrating how bootc's container-native approach makes it easy to
+test OS images in CI using standard container tooling (BCVK) before
+deploying to production.
+
+[**From Compliance to Containers: Managing Fedora Fleets in the Atomic Era**](https://cfp.fedoraproject.org/flock-to-fedora-2026/talk/GMFYQH/)
+(Adam Baali and Jonathan Billings, 55 min) — Bridging compliance
+requirements with immutable image-based systems like Silverblue,
+Kinoite, and bootc, demonstrating transparent tooling for NIST
+controls.
+
+[**What's new in Fedora CoreOS in 2026?**](https://cfp.fedoraproject.org/flock-to-fedora-2026/talk/JLKXBS/)
+(Jean-Baptiste Trystram and Joel Capitao, 25 min) — Highlights from
+the past year of Fedora CoreOS development, including OCI distribution
+migration, bootc integration progress, and the move to
+bootc-image-builder.