Update GitHub Actions workflow for Docker builds

.github/workflows/build.yml

@@ -1,10 +1,15 @@
+name: Build Container Images
+
 on:
   push:
     branches: [ "main" ]
-  
+  schedule:
+    - cron: "0 4 * * *"
+  workflow_dispatch:
+
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE_PREFIX: ${{ github.repository }}
 
 jobs:
   build:
@@ -12,17 +17,25 @@ jobs:
     permissions:
       contents: read
       packages: write
-      id-token: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - name: rpmbuild
+            context: ./rpmbuild
+          - name: kernel
+            context: ./kernel
 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+        uses: docker/setup-buildx-action@v3
 
-      - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+      - name: Log into registry
+        uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -30,17 +43,17 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934
+        uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_PREFIX }}/${{ matrix.image.name }}
           tags: |
             type=raw,value=latest
+            type=raw,value={{date 'YYYYMMDD'}}
 
-      - name: Build and push Docker image
-        id: build-and-push
-        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
+      - name: Build and push ${{ matrix.image.name }}
+        uses: docker/build-push-action@v5
         with:
-          context: .
+          context: ${{ matrix.image.context }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}