Add docker and github-actions to dependabot config and cleanup comments

Author: neilcook

.github/dependabot.yml

@@ -1,11 +1,27 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
 # Please see the documentation for all configuration options:
 # https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
 
 version: 2
 updates:
-  - package-ecosystem: "gomod" # See documentation for possible values
+  - package-ecosystem: "gomod"
     directory: "/" # Location of package manifests
     schedule:
       interval: "weekly"
+      day: "sunday"
+      time: "16:00"
+  - package-ecosystem: "docker"
+    directories:
+      - "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "16:00"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "16:00"
+    groups:
+      all-actions:
+        patterns: [ "*" ]