Use docker buildx and multiplatform

.gitea/workflows/docker.yml

@@ -12,30 +12,28 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Login to Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: gitea.spilum.net
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
 
-      - name: Build Docker Image
-        env:
-          BRANCH_NAME: ${{ github.ref_name }}
-          SHORT_HASH: ${{ github.sha }}
-        run: |
-          # Build the image with the commit hash tag
-          docker build --build-arg BUILD_IDENTIFIER=${SHORT_HASH:0:5} -t gitea.spilum.net/spilum.net/mtf-nlp:${BRANCH_NAME}-${SHORT_HASH:0:5} .
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
-          # Tag the same image as "latest"
-          docker tag gitea.spilum.net/spilum.net/mtf-nlp:${BRANCH_NAME}-${SHORT_HASH:0:5} gitea.spilum.net/spilum.net/mtf-nlp:${BRANCH_NAME}-latest
+      - name: Build and Push (multi-arch)
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
 
-      - name: Push Docker Image
-        env:
-          BRANCH_NAME: ${{ github.ref_name }}
-          SHORT_HASH: ${{ github.sha }}
-        run: |
-          docker push gitea.spilum.net/spilum.net/mtf-nlp:${BRANCH_NAME}-${SHORT_HASH:0:5}
-          docker push gitea.spilum.net/spilum.net/mtf-nlp:${BRANCH_NAME}-latest
+          build-args: |
+            BUILD_IDENTIFIER=${{ github.sha[0:5] }}
+
+          tags: |
+            gitea.spilum.net/spilum.net/mtf-nlp:${{ github.ref_name }}-${{ github.sha[0:5] }}
+            gitea.spilum.net/spilum.net/mtf-nlp:${{ github.ref_name }}-latest
 
       - name: Log out from registry
         if: always()