add dockerfile syntax

aptalca · aptalca · commit b05c951c0296 · 2023-04-13T15:40:48.000-04:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM scratch
 
 LABEL maintainer="username"
diff --git a/Dockerfile.complex b/Dockerfile.complex
@@ -1,5 +1,7 @@
+# syntax=docker/dockerfile:1
+
 ## Buildstage ##
-FROM ghcr.io/linuxserver/baseimage-alpine:3.15 as buildstage
+FROM ghcr.io/linuxserver/baseimage-alpine:3.17 as buildstage
 
 RUN \
   echo "**** install packages ****" && \
