add build workflow

.github/workflows/build.yml

@@ -1,53 +1,18 @@
-name: ci
+name: Build
 
 on:
-  pull_request:
+  workflow_run:
-  push:
+    workflows: [Tests]
-    branches: [main]
+    types:
+      - completed
 
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  prepare:
+  build:
     runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: docker/setup-buildx-action@v3
-      - name: build ci image
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          tags: teufa:ci
-          target: ci
-          load: true
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          push: false
-
-  tests:
-    runs-on: ubuntu-latest
-    needs: prepare
-    container: teufa:ci
-    services:
-      postgres:
-        image: postgres
-        env:
-          POSTGRES_PASSWORD: postgres
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-        ports:
-          - 5432:5432
-    steps:
-      - run: pytest
-
-  build-push:
-    runs-on: ubuntu-latest
-    needs: tests
     permissions:
       contents: read
       packages: write