Use GitHub Action to build image

.github/workflows/docker-publish.yml

@@ -0,0 +1,47 @@
+name: Build Ostree Container Image
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  schedule:
+    - cron: '00 9 * * *'
+  push:
+    branches: [ '*' ]
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: 
+      image: fedora:latest
+      options: --privileged
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Build
+        env:
+          registry: ${{ vars.REGISTRY }}
+          username: ${{ vars.QUAY_USER }}
+          password: ${{ secrets.QUAY_PASSWORD }}    
+          image: ${{ vars.IMAGE_NAME }}
+          tag: ${{ github.ref_name }}
+          composefile: ${{ vars.COMPOSEFILE }} 
+        run: |
+          dnf -y install podman rpm-ostree git skopeo buildah selinux-policy-targeted
+          skopeo login -u $username -p $password $registry
+          mkdir -p repo cache
+          ostree init --repo=repo --mode=archive
+          rpm-ostree compose image --initialize-mode=if-not-exists \
+            --format registry --layer-repo repo --cachedir=cache \
+            $composefile \
+            $registry/$image:$tag
+            
+