diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
new file mode 100644
index 0000000..1e378b7
--- /dev/null
+++ b/.gitea/workflows/build.yaml
@@ -0,0 +1,39 @@
+# Builds the custom OpenClaw image and pushes it to Gitea's container registry.
+# Runs on every push to main, weekly (to pick up new OpenClaw releases), or manually.
+# Requires repo secrets REGISTRY_USER and REGISTRY_TOKEN (token with package:write).
+
+name: Build OpenClaw image
+
+on:
+  push:
+    branches: [main]
+  schedule:
+    - cron: "0 4 * * 1"   # Mondays 04:00
+  workflow_dispatch:
+
+env:
+  REGISTRY: gitea.davidgailleton.me
+  IMAGE: gitea.davidgailleton.me/da7e/openclaw-brew
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.REGISTRY_USER }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          pull: true          # always fetch the newest base OpenClaw image
+          push: true
+          tags: |
+            ${{ env.IMAGE }}:latest
+            ${{ env.IMAGE }}:${{ github.sha }}
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