build: Specify Dockerfile version (#5689)

Signed-off-by: Alex Collins <alex_collins@intuit.com>
argoproj · Apr 16, 2021 · 5a39722 · 5a39722
1 parent e3d1d1e
commit 5a39722
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -1,3 +1,4 @@
+#syntax=docker/dockerfile:1.2
 
 ARG DOCKER_CHANNEL=stable
 ARG DOCKER_VERSION=18.09.1