Add nightly for Docker build

.github/workflows/build.yml

@@ -5,7 +5,7 @@ on:
     tags:
       - '*'
   schedule:
-    - cron: '0 9 * * *'
+    - cron: '0 1 * * *'
 
 jobs:
   build:
@@ -32,13 +32,13 @@ jobs:
     - name: Check out code
       uses: actions/checkout@v4
 
-    - name: Check for New Commits (Nightly Only)
+    - name: Check for new commits (nightly only)
       id: check
       if: github.event_name == 'schedule'
       continue-on-error: false
       run: |
         # 3AM CET
-        since="$(date -d 'yesterday' +%Y-%m-%d) 09:00:00"
+        since="$(date -d 'yesterday' +%Y-%m-%d) 01:00:00"
         count=$(git rev-list --count --since="$since" --until=now HEAD)
         if [ "$count" -gt 0 ]; then
           echo "new_commits=true" >> $GITHUB_OUTPUT