Use modern build actions

.github/workflows/build.yaml

@@ -14,21 +14,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Prepare
-        id: prepare
-        run: |
-          DOCKER_IMAGE=ghcr.io/${{ github.repository_owner }}/linx-server
-          DOCKER_PLATFORMS=linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/386
-          VERSION=${GITHUB_REF#refs/tags/v}
-          TAGS="--tag ${DOCKER_IMAGE}:${VERSION} --tag ${DOCKER_IMAGE}:latest --tag ${DOCKER_IMAGE}:${GITHUB_SHA::8}"
-
-          echo ::set-output name=docker_image::${DOCKER_IMAGE}
-          echo ::set-output name=version::${VERSION}
-          echo ::set-output name=buildx_args::--platform ${DOCKER_PLATFORMS} \
-            --build-arg VERSION=${VERSION} \
-            --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
-            --build-arg VCS_REF=${GITHUB_SHA::8} \
-            ${TAGS} --file Dockerfile .
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/linx-server
       
       - name: Login to GHCR
         uses: docker/login-action@v2
@@ -38,12 +28,10 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up Docker Buildx
-        uses: crazy-max/ghaction-docker-buildx@v3
-
-      - name: Docker Buildx (build)
-        run: docker buildx build --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}
-      
-      - name: Docker Buildx (push)
-        if: success()
-        run: docker buildx build --output "type=image,push=true" ${{ steps.prepare.outputs.buildx_args }}
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}