Add workflow

.gitea/workflows/docker.yml

@@ -0,0 +1,26 @@
+name: Docker Build and Push
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Login to Docker registry
+      uses: docker/login-action@v3
+      with:
+        registry: git.nice.nz
+        username: hads
+        password: ${{ secrets.PAT }}
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+    - name: Build and push
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: git.nice.nz/hads/postgres-backup:latest