Fix S3 wrong mime-type of the .qcow2 image file

Use s3cmd for uploading the pre-built images, to fix the previous action
wrong mime-type.

.github/workflows/build-disk-images.yml

@@ -39,11 +39,13 @@ jobs:
           - qemu.rl
     needs:
       - core-version
-    env:
-      DO_SPACE_NAME: 'ns8'
-      DO_SPACE_REGION: 'ams3'
     if: needs.core-version.outputs.is_stable == 'true'
     steps:
+      - name: Setup s3cmd
+        uses: s3-actions/[email protected]
+        with:
+          access_key: ${{ secrets.DO_SPACE_ACCESS_KEY }}
+          secret_key: ${{ secrets.DO_SPACE_SECRET_KEY }}
       - name: Setup `packer`
         uses: hashicorp/setup-packer@main
       - uses: actions/checkout@v4
@@ -71,30 +73,16 @@ jobs:
           cd $(dirname ${{ steps.qcow2.outputs.path }})
           sha256sum $(basename ${{ steps.qcow2.outputs.path }}) > ../CHECKSUM
           sha256sum $(basename ${{ steps.vmdk.outputs.path }}) >> ../CHECKSUM
-      - name: Upload qcow2 NS8 image
-        uses: BetaHuhn/do-spaces-action@v2
-        with:
-          access_key: ${{ secrets.DO_SPACE_ACCESS_KEY }}
-          secret_key: ${{ secrets.DO_SPACE_SECRET_KEY }}
-          space_name: ${{ env.DO_SPACE_NAME }}
-          space_region: ${{ env.DO_SPACE_REGION }}
-          source: ${{ steps.qcow2.outputs.path }}
-          out_dir: ns8-images
-      - name: Upload vmdk NS8 image
-        uses: BetaHuhn/do-spaces-action@v2
-        with:
-          access_key: ${{ secrets.DO_SPACE_ACCESS_KEY }}
-          secret_key: ${{ secrets.DO_SPACE_SECRET_KEY }}
-          space_name: ${{ env.DO_SPACE_NAME }}
-          space_region: ${{ env.DO_SPACE_REGION }}
-          source: ${{ steps.vmdk.outputs.path }}
-          out_dir: ns8-images
-      - name: Upload checksum
-        uses: BetaHuhn/do-spaces-action@v2
-        with:
-          access_key: ${{ secrets.DO_SPACE_ACCESS_KEY }}
-          secret_key: ${{ secrets.DO_SPACE_SECRET_KEY }}
-          space_name: ${{ env.DO_SPACE_NAME }}
-          space_region: ${{ env.DO_SPACE_REGION }}
-          source: CHECKSUM
-          out_dir: ns8-images
+      - name: Upload images with s3cmd
+        run: >
+          s3cmd put
+          --host ams3.digitaloceanspaces.com
+          --verbose
+          --progress
+          --acl-public
+          --guess-mime-type
+          --mime-type=application/octet-stream
+          ${{ steps.qcow2.outputs.path }}
+          ${{ steps.vmdk.outputs.path }}
+          CHECKSUM
+          s3://ns8/ns8-images