Add schedule to the CI

.github/workflows/publish-docker-images.yml

@@ -1,12 +1,14 @@
 ---
 on:
+  schedule:
+    - cron: '0 4 * * *' # Every day at 4:00am
   push:
     tags:
       - '*'
   release:
     types: [released]
 
-name: Publish tagged image to Docker Hub
+name: Publish tagged images to Docker Hub
 
 jobs:
   docker:
@@ -19,6 +21,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Login to DockerHub
+        if: github.event_name != 'schedule'
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
@@ -29,7 +32,7 @@ jobs:
         uses: docker/metadata-action@v3
         with:
           images: getmeili/meilisearch
-          # Output 'latest' tag only when 'release' happen, instead of when 'push tag' event happend (default behavior).
+          # The lastest tag is only pushed for the official Meilisearch release
           # See https://github.com/docker/metadata-action#latest-tag
           flavor: latest=false
           tags: |
@@ -40,6 +43,7 @@ jobs:
         id: docker_build
         uses: docker/build-push-action@v2
         with:
-          push: true
+          # We do not push tags for the cron jobs, this is only for test purposes
+          push: ${{ github.event_name != 'schedule' }}
           platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}