build(dependabot): enable docker and github-actions updates (#32)

Signed-off-by: Romain Lespinasse <romain.lespinasse@gmail.com>

.github/dependabot.yaml

@@ -0,0 +1,25 @@
+version: 2
+updates:
+  - package-ecosystem: "docker"
+    directory: "/"
+    commit-message:
+      prefix: "feat: "
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+      time: "00:00"
+    reviewers:
+      - "rlespinasse"
+    labels: [ ]
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      dependencies:
+        patterns:
+          - "*"
+    reviewers:
+      - "rlespinasse"
+    labels: [ ]