ci: update Gitea Actions workflow with docker/build-push-action

.gitea/workflows/build.yaml

@@ -13,15 +13,22 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Build and push with Kaniko
-        uses: aicoe-aioc/kaniko-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Registry
+        uses: docker/login-action@v3
         with:
           registry: ${{ secrets.REGISTRY_HOSTPORT }}
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
-          repo: nxtgauge-ai-assistant
-          tags: |
-            ${{ github.sha }}
-            ${{ github.ref_name }}-latest
-          dockerfile: Dockerfile
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
           context: .
+          push: true
+          tags: |
+            ${{ secrets.REGISTRY_HOSTPORT }}/nxtgauge-ai-assistant:${{ gitea.sha }}
+            ${{ secrets.REGISTRY_HOSTPORT }}/nxtgauge-ai-assistant:${{ gitea.ref }}-latest
+          dockerfile: Dockerfile