Update .github/workflows/build

.github/workflows/build

@@ -0,0 +1,58 @@
+name: Build and Publish TVJ EPG Image
+
+on:
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Read version
+        id: version
+        run: |
+          VERSION=$(cat VERSION | tr -d ' \n')
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+      - name: Install Podman
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y podman
+
+      - name: Log in to GitHub Container Registry
+        run: |
+          echo "${{ secrets.GHCR_TOKEN }}" | podman login ghcr.io \
+            -u ${{ github.actor }} \
+            --password-stdin
+
+      - name: Build image with Podman (multi-tag)
+        run: |
+          IMAGE=ghcr.io/${{ github.repository }}
+          VERSION=${{ steps.version.outputs.version }}
+          SHORT_SHA=${GITHUB_SHA::7}
+
+          podman build \
+            -f Containerfile \
+            -t $IMAGE:latest \
+            -t $IMAGE:v$VERSION \
+            -t $IMAGE:sha-$SHORT_SHA \
+            .
+
+      - name: Push all tags
+        run: |
+          IMAGE=ghcr.io/${{ github.repository }}
+          VERSION=${{ steps.version.outputs.version }}
+          SHORT_SHA=${GITHUB_SHA::7}
+
+          podman push $IMAGE:latest
+          podman push $IMAGE:v$VERSION
+          podman push $IMAGE:sha-$SHORT_SHA