dockerfile: fix wrong args order

Commit 47959b5 (image: allow passing explicit samba base-image)
introduced the ability to set explicit base image and tag via command
line args. However, it also introduced a bug in the Dockerfile flow
which causes version and commit-id not to propagate properly into
smbmetrics binary.

Signed-off-by: Shachar Sharon <[email protected]>

Author: synarete

Dockerfile

@@ -1,11 +1,10 @@
-# Args
 ARG BASE_IMG="quay.io/samba.org/samba-server:latest"
-ARG GIT_VERSION="(unset)"
-ARG COMMIT_ID="(unset)"
-ARG ARCH=""
 
 # Build smbmetrics
 FROM docker.io/golang:1.24 AS builder
+ARG GIT_VERSION="(unset)"
+ARG COMMIT_ID="(unset)"
+ARG ARCH=""
 
 WORKDIR /workspace
 # Copy the Go Modules manifests