demo: force buildkit

Signed-off-by: Mikko Ylinen <[email protected]>

Author: mythi

demo/build-image.sh

@@ -18,7 +18,7 @@ CWD=`dirname $0`
 TAG=${TAG:-devel}
 
 if [ -z "$BUILDER" -o "$BUILDER" = 'docker' -o "$BUILDER" = 'podman' ] ; then
-    ${BUILDER} build --pull -t ${IMG}:${TAG} "$CWD/$DIR/"
+    DOCKER_BUILDKIT=1 ${BUILDER} build --pull -t ${IMG}:${TAG} "$CWD/$DIR/"
 elif [ "$BUILDER" = 'buildah' ] ; then
     buildah bud  --pull-always -t ${IMG}:${TAG} "$CWD/$DIR/"
 else