Build and upload uki artifact on PR

Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>

.github/workflows/image.yaml

@@ -220,6 +220,28 @@ jobs:
           earthly +build-framework-image --FLAVOR=${FLAVOR} --VERSION=master
           docker tag quay.io/kairos/framework:master_${{ matrix.flavor }} ttl.sh/kairos-framework-${{ matrix.flavor }}-${{ github.sha }}:8h
           docker push ttl.sh/kairos-framework-${{ matrix.flavor }}-${{ github.sha }}:8h
+  build-uki:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          git fetch --prune --unshallow
+      - name: Install earthly
+        uses: Luet-lab/luet-install-action@v1
+        with:
+          repository: quay.io/kairos/packages
+          packages: utils/earthly
+      - name: Build uki image 🔧
+        run: |
+          # Do fedora as its the smaller uki possible
+          earthly +uki --FLAVOR=fedora
+      - name: Upload uki artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: kairos.uki.zip
+          path: |
+            build/*.efi
+          if-no-files-found: error
   install-test:
     needs:
       - build