publish step

.forgejo/workflows/publish.yaml

@@ -0,0 +1,21 @@
+name: ci
+
+on:
+  push:
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Get Git commit timestamps
+        run: echo "TIMESTAMP=$(git log -1 --pretty=%ct)" >> $GITHUB_ENV
+
+      - name: Build
+        uses: docker/build-push-action@v6
+        with:
+          tags: user/app:latest
+        env:
+          SOURCE_DATE_EPOCH: ${{ env.TIMESTAMP }}