ci: sync dependabot config (#734)

.github/dependabot.yml

@@ -1,20 +1,41 @@
 version: 2
+
 updates:
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
-      interval: "daily"
-    labels:
-      - "dependencies"
-    commit-message:
-      prefix: "feat"
-      include: "scope"
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "monday"
+      time: "05:00"
+      timezone: "America/New_York"
     labels:
       - "dependencies"
     commit-message:
       prefix: "chore"
       include: "scope"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "05:00"
+      timezone: "America/New_York"
+    labels:
+      - "dependencies"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "05:00"
+      timezone: "America/New_York"
+    labels:
+      - "dependencies"
+    commit-message:
+      prefix: "feat"
+      include: "scope"

.github/workflows/dependabot-sync.yml

@@ -0,0 +1,15 @@
+name: dependabot-sync
+on:
+  schedule:
+    - cron: "0 0 * * 0" # every Sunday at midnight
+  workflow_dispatch: # allows manual triggering
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot-sync:
+    uses: charmbracelet/meta/.github/workflows/dependabot-sync.yml@main
+    with:
+      repo_name: ${{ github.event.repository.name }}