Configure Renovate (#753)

* Add renovate.json

* Update renovate.json

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Luca Comellini <[email protected]>

Author: renovate[bot]

renovate.json

@@ -0,0 +1,9 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+	"docker:enableMajor"
+  ],
+  "automerge": true,
+  "rebaseWhen": "auto"
+}