diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
new file mode 100644
index 0000000..cae4325
--- /dev/null
+++ b/.gitea/workflows/build.yml
@@ -0,0 +1,40 @@
+name: build-images
+
+# Gitea Actions build container images and push to the Gitea registry on
+# git.jpaul.io. Servers pull to deploy — no build on the host.
+#
+# Requires repo/org secrets: REGISTRY_USERNAME, REGISTRY_PASSWORD (a token with
+# package:write). Adjust the runner label to one your Gitea runner advertises.
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+
+env:
+  REGISTRY: git.jpaul.io
+  IMAGE_BASE: git.jpaul.io/${{ github.repository }}
+
+jobs:
+  backend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Gitea registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Build and push backend image
+        uses: docker/build-push-action@v6
+        with:
+          context: ./backend
+          push: true
+          tags: |
+            ${{ env.IMAGE_BASE }}/backend:latest
+            ${{ env.IMAGE_BASE }}/backend:${{ github.sha }}