gh actions: build Docker images once a day

diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 3cbc31d6c4fa4a23c4c63a5835dab4efa571c013..09c3dd9049bcb022dba1c75e13d8d62565a834ce 100644 (file)
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -2,10 +2,8 @@
 name: 'Build Docker images'
 
 on:
-  push:
-  pull_request:
   schedule:
-    - cron: '0 22 * * 3'
+    - cron: '0 4 * * *'
 
 jobs:
   build: