Make build cross-platform

.gitea/workflows/docker.yml

@@ -1,4 +1,4 @@
-name: Build and Push Docker Image
+name: Build and Push Backend Docker Image
 
 on:
   push:
@@ -24,32 +24,30 @@ jobs:
           ls -la src/modules/redis
 
       - 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: ${{ github.sha }}
-        run: |
-          docker build \
-            --build-arg BUILD_IDENTIFIER=${SHORT_HASH:0:5} \
-            -t gitea.spilum.net/spilum.net/mtf-backend:${BRANCH_NAME}-${SHORT_HASH:0:5} .
+      - name: Set SHORT_SHA
+        id: vars
+        run: echo "short_sha=${GITHUB_SHA::5}" >> "$GITHUB_OUTPUT"
 
-          docker tag \
-            gitea.spilum.net/spilum.net/mtf-backend:${BRANCH_NAME}-${SHORT_HASH:0:5} \
-            gitea.spilum.net/spilum.net/mtf-backend:${BRANCH_NAME}-latest
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
-      - name: Push Docker Image
-        env:
-          BRANCH_NAME: ${{ github.ref_name }}
-          SHORT_HASH: ${{ github.sha }}
-        run: |
-          docker push gitea.spilum.net/spilum.net/mtf-backend:${BRANCH_NAME}-${SHORT_HASH:0:5}
-          docker push gitea.spilum.net/spilum.net/mtf-backend:${BRANCH_NAME}-latest
+      - name: Build and Push Backend (multi-arch)
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          build-args: |
+            BUILD_IDENTIFIER=${{ steps.vars.outputs.short_sha }}
+          tags: |
+            gitea.spilum.net/spilum.net/mtf-backend:${{ github.ref_name }}-${{ steps.vars.outputs.short_sha }}
+            gitea.spilum.net/spilum.net/mtf-backend:${{ github.ref_name }}-latest
 
       - name: Log out from registry
         if: always()