You’ve actually seen this mechanism before. The # syntax= directive at the top of a Dockerfile tells BuildKit which frontend image to use. # syntax=docker/dockerfile:1 is just the default. You can point it at any image.
The people who use our boards.393 interviews since 2018
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Tim Fernholz is a journalist who writes about technology, finance and public policy. He has closely covered the rise of the private space industry and is the author of Rocket Billionaires: Elon Musk, Jeff Bezos and the New Space Race. Formerly, he was a senior reporter at Quartz, the global business news site, for more than a decade, and began his career as a political reporter in Washington, D.C.
ВСУ запустили «Фламинго» вглубь России. В Москве заявили, что это британские ракеты с украинскими шильдиками16:45
For the last five years I have been working on Towerborne, an action RPG brawler developed by Stoic Studio and published by Xbox Game Studios. Towerborne launched on Steam in early access on September 10th, 2024 and then on Xbox in game preview on April 29th, 2025. On February 26th, 2026, Towerborne had its full 1.0 release on Steam, Xbox, and PS5.