add renovate for base image as well

renovate.json

 {
   "extends": ["config:base"],
   "baseBranches": ["development"],
-  "automerge": true,
-  "gitLabAutomerge": true,
   "regexManagers": [
     {
       "fileMatch": ["^hardening_manifest.yaml$"],
@@ -14,6 +12,27 @@
       ],
       "depNameTemplate": "gcr.io/kaniko-project/executor",
       "datasourceTemplate": "docker"
+    },
+    {
+      "fileMatch": ["^hardening_manifest.yaml$", "^Dockerfile$"],
+      "matchStrings": [
+        "BASE_TAG: \"(?<currentValue>.*?)\"",
+        "BASE_TAG=(?<currentValue>.*?)$"
+      ],
+      "depNameTemplate": "registry1.dso.mil/ironbank/redhat/ubi/ubi8-minimal",
+      "datasourceTemplate": "docker"
+    }
+  ],
+  "groupName": "all dependencies",
+  "separateMajorMinor": false,
+  "groupSlug": "all",
+  "packageRules": [
+    {
+      "matchPackagePatterns": [
+        "*"
+      ],
+      "groupName": "all dependencies",
+      "groupSlug": "all"
     }
   ]
 }