Create dependabot.yml

This will add auto-update for:
- the docker image
- GH actions
- Go dependencies

Author: thomasferrandiz

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# 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: "docker" 
+    directory: "images" 
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "gomod" 
+    directory: "/" 
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions" 
+    directory: ".github"
+    schedule:
+      interval: "weekly"