diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 4de00a30..4356981b 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -2,13 +2,9 @@ name: docker-build
 
 on:
   workflow_dispatch:
-  push:
-    paths-ignore:
-      - 'docs/**'
-      - 'README.md'
-    branches:
-      - 'master'
-      - 'staging'
+  schedule:
+    - cron: '0 0 * * *' # runs daily at 00:00
+
   release:
     types: [published]
 
@@ -32,7 +28,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Push master (to staging)
-        if: github.ref == 'refs/heads/master'
+        if: github.ref == 'refs/heads/master' && env.NEW_COMMIT_COUNT > 0
         uses: docker/build-push-action@v2
         with:
           push: true
@@ -43,7 +39,7 @@ jobs:
       - name: Get version
         id: get_version
         if: startsWith(github.ref, 'refs/tags/v')
-        run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
+        run: echo "VERSION=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_OUTPUT
 
       - name: Push release
         if: startsWith(github.ref, 'refs/tags/v')