feat(blog): new Blockstor banner

[Timur Tukaev (tym83)]

Summary

Swaps the announcement image on the Blockstor post for the Blockstor social banner.

What changed

• The image. Same 1200×630 frame, so the Open Graph preview keeps its proportions and nothing about the page layout moves.
• File size: 1.3 MB → 142 KB. The previous PNG was a photographic export of a blueprint illustration; this one is flat artwork, which PNG compresses properly. Kept as PNG rather than the source JPEG to match every other post in content/en/blog/, and because flat art with text stays crisper without JPEG ringing around the lettering.
• Alt text. It described the old picture. It now describes this one.

Note for reviewers

The previous banner carried AENIX branding; this one is Blockstor's own. On a site for a CNCF project that seems like the right direction, but flagging it in case the change was meant to be purely cosmetic.

Verification

hugo --minify --buildFuture builds clean. With the production baseURL the tag resolves as expected:

og:image = https://cozystack.io/blog/2026/08/blockstor-linstor-compatible-storage-for-kubernetes/blockstor-announcement.png

The bundle keeps its single image and the frontmatter images: entry is unchanged, so nothing else needed touching.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4c7e393 and a55d86a.

⛔ Files ignored due to path filters (1)

• content/en/blog/2026-08-04-blockstor-linstor-compatible-storage-for-kubernetes/blockstor-announcement.png is excluded by !**/*.png

📒 Files selected for processing (1)

• content/en/blog/2026-08-04-blockstor-linstor-compatible-storage-for-kubernetes/index.md

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