a better backend deployment workflow

.gitea/workflows/workflow_build-image.yaml

@@ -0,0 +1,38 @@
+on:
+  workflow_call:
+    inputs:
+      tag:
+        required: true
+        type: string
+    secrets:
+      PACKAGE_REGISTRY_ACCESS:
+        required: true
+
+
+name: Build and push docker image
+
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - uses: https://gitea.com/actions/checkout@v4
+
+    - name: Login to Docker Registry
+      uses: docker/login-action@v3
+      with:
+        registry: git.kluster.moll.re
+        username: ${{ gitea.repository_owner }}
+        password: ${{ secrets.PACKAGE_REGISTRY_ACCESS }}
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build and push
+      uses: docker/build-push-action@v5
+      with:
+        context: backend
+        tags: git.kluster.moll.re/anydev/anyway-backend:${{intputs.tag}}
+        push: true