Testing another build syntax

Signed-off-by: Alex Lau (AvengerMoJo) <alau@suse.com>

.gitea/workflows/obs-service.yaml

@@ -1,7 +1,16 @@
 name: OSC Pull Custom Image Demo
 run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
-on: [push]
+on:
+  push:
+    branches: [ factory ]
 jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build the Docker image
+        run: docker build . --file Dockerfile --platform linux/amd64 --tag bc:latest
+
   osc_job:
     runs-on: ubuntu-latest
     name: opensuse osc custom container checkout test
@@ -15,4 +24,3 @@ jobs:
         env: # Or as an environment variable
           osc_pass: ${{ secrets.OSCPASS }}
         id: osc-demo
-        run: docker build . --file Dockerfile --tag bc:latest