ci: update container build script

.gitea/workflows/ci.yaml

@@ -1,32 +1,26 @@
-name: Container build
-on: [ push ]
+name: Build container
+on:
+  push:
+  schedule:
+    - cron: '0 16 * * FRI'
 
 jobs:
-  container-build:
-    runs-on: ubuntu-latest
-    if: gitea.ref == 'refs/heads/main'
+  build:
+    runs-on: container-builder
     steps:
-      - name: Clone repo
-        uses: actions/checkout@v4
-      - name: Set up BuildX
-        uses: docker/setup-buildx-action@v2
+      - uses: actions/checkout@v4
+      - name: Build
+        uses: redhat-actions/buildah-build@v2
         with:
-          endpoint: 'unix:///var/run/docker.sock'
-      - name: Set up QEMU
-        uses: Job79/setup-qemu-action@master
-      - name: Login to Registry
-        uses: docker/login-action@v3
+          image: ${{ github.repository_owner }}/${{ github.event.repository.name }}
+          tags: latest
+          containerfiles: |
+            ./Containerfile
+      - name: Push
+        uses: redhat-actions/push-to-registry@v2
         with:
+          image: ${{ github.repository_owner }}/${{ github.event.repository.name }}
+          tags: latest
           registry: git.plabble.org
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_TOKEN }}
-      - name: Build and push
-        uses: docker/build-push-action@v4
-        with:
-          context: .
-          file: ./Containerfile
-          platforms: |
-            linux/arm64                        
-          push: true
-          tags: |
-            git.plabble.org/job79/pastabble:latest