added workflows

.gitea/workflows/backend.yaml

@@ -0,0 +1,25 @@
+name: backend-action
+run-name: ${{ gitea.actor }} is building docker image 🚀
+on: [push]
+
+jobs:
+  build-image:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: gitea.cognizata.com
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64
+          tags: gitea.cognizata.com/atapy/sorvor:latest
+          target: app
+      - run: echo "🍏 This job's status is ${{ job.status }}."