Add automatic daily container build test and badge in readme

.github/workflows/build.yml

@@ -0,0 +1,46 @@
+name: Build
+
+on:
+  schedule:
+    - cron: '0 16 * * *'
+  workflow_dispatch:
+
+permissions:
+  packages: write
+
+env:
+  ContainerRegistry: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push multi-arch image (agent + server + player)
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: containers/Dockerfile # updated Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: false
+          build-args: |
+            TARGETARCH
+          tags: |
+            ${{ env.ContainerRegistry }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}

README.md

@@ -13,7 +13,7 @@ SPDX-License-Identifier: Apache-2.0
 
 # PULLPIRI
 
-[![Build status](https://github.com/eclipse-pullpiri/pullpiri/actions/workflows/release.yml/badge.svg)](https://github.com/eclipse-pullpiri/pullpiri/actions/workflows/release.yml)
+[![Build status](https://github.com/eclipse-pullpiri/pullpiri/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/eclipse-pullpiri/pullpiri/actions/workflows/build.yml)
 
 The main goal of PULLPIRI project is to develop an efficient vehicle service
 orchestrator framework to realize the potential benefits of cloud native