From 706456de1f63a4b9796592fd452da7ce30735274 Mon Sep 17 00:00:00 2001
From: Jason Robinson <jasonr@element.io>
Date: Tue, 26 Apr 2022 17:31:52 +0300
Subject: Mark Dockerfile as requiring BuildKit (#12541)

Co-authored-by: David Robertson <davidr@element.io>
---
 docker/Dockerfile | 1 +
 1 file changed, 1 insertion(+)

(limited to 'docker/Dockerfile')

diff --git a/docker/Dockerfile b/docker/Dockerfile
index 4523c60645..ccc6a9f778 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,3 +1,4 @@
+# syntax=docker/dockerfile:1
 # Dockerfile to build the matrixdotorg/synapse docker images.
 #
 # Note that it uses features which are only available in BuildKit - see
-- 
cgit 1.4.1