Tag latest every night to keep image up to date

Signed-off-by: gearnode <bryan@frimin.fr>

Author: gearnode

.github/workflows/docker-build-push.yml

@@ -7,6 +7,8 @@ on:
   pull_request:
     branches: [main]
   workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
 
 env:
   REGISTRY: ghcr.io
@@ -49,7 +51,7 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
             type=sha,format=long
-            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value=latest,enable=${{ github.event_name == 'schedule' || github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5