build OCI images for x86_64 and aarch64 in CI

Signed-off-by: strawberry <strawberry@puppygock.gay>

.github/workflows/ci.yml

@@ -90,4 +90,26 @@ jobs:
         with:
           name: static-aarch64-unknown-linux-musl
           path: result/bin/conduit
+          if-no-files-found: error
+
+      - name: Build oci-image-x86_64-unknown-linux-gnu
+        run: |
+          ./bin/nix-build-and-cache .#oci-image
+
+      - name: Upload artifact oci-image-x86_64-unknown-linux-gnu
+        uses: actions/upload-artifact@v4
+        with:
+          name: oci-image-x86_64-unknown-linux-gnu
+          path: result
+          if-no-files-found: error
+
+      - name: Build oci-image-aarch64-unknown-linux-musl
+        run: |
+          ./bin/nix-build-and-cache .#oci-image-aarch64-unknown-linux-musl
+
+      - name: Upload artifact oci-image-aarch64-unknown-linux-musl
+        uses: actions/upload-artifact@v4
+        with:
+          name: oci-image-aarch64-unknown-linux-musl
+          path: result
           if-no-files-found: error