PTFE-821 Add dependabot for docker and actions

.github/dependabot.yaml

@@ -1,14 +1,32 @@
 ---
 version: 2
-
+registries:
+  dockerhub: # Define access for a private registry
+    type: docker-registry
+    url: registry.hub.docker.com
+    username: ${{ secrets.DOCKERHUB_LOGIN }}
+    password: ${{ secrets.DOCKERHUB_PASSWORD }}
 updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "daily"
     open-pull-requests-limit: 10
-  - package-ecosystem: "pip"
-    directory: "/"
+    commit-message:
+      prefix: github-actions
+      include: scope
+    labels:
+      - github-actions
+      - dependencies
+  - package-ecosystem: docker
+    registries:
+      - dockerhub
+    directory: /
     schedule:
-      interval: "daily"
-    open-pull-requests-limit: 10
+      interval: weekly
+    commit-message:
+      prefix: docker
+      include: scope
+    labels:
+      - docker
+      - dependencies