build: fix wrong dockerfile configuration for multi-platform

Signed-off-by: Yang Chiu <yang.chiu@suse.com>

scripts/package

@@ -9,11 +9,22 @@ mkdir -p dist/artifacts
 cp bin/* dist/artifacts
 mv dist/artifacts/support-bundle-kit dist/artifacts/support-bundle-kit${SUFFIX}
 
+case $(uname -m) in
+  aarch64 | arm64)
+    ARCH=arm64
+    ;;
+  x86_64)
+    ARCH=amd64
+    ;;
+  s390x)
+    ARCH=s390x
+    ;;
+  *)
+    echo "$(uname -a): unsupported architecture"
+    exit 1
+esac
+
 IMAGE=${REPO}/support-bundle-kit:${TAG}
-DOCKERFILE=Dockerfile
-if [ -e ${DOCKERFILE}.${ARCH} ]; then
-    DOCKERFILE=${DOCKERFILE}.${ARCH}
-fi
 
-docker build -f package/${DOCKERFILE} -t ${IMAGE} .
+docker build --build-arg ARCH=${ARCH} --no-cache -f package/Dockerfile -t ${IMAGE} .
 echo Built ${IMAGE}