feat(elk): add Renovate configuration for Elasticsearch image versioning

modules/elk/main.tf

@@ -3,6 +3,7 @@ resource "nomad_job" "elk" {
 
   hcl2 {
     vars = {
+      # renovate: image=docker.elastic.co/elasticsearch/elasticsearch
       "elastic_version" = "8.17.0",
     }
   }

renovate.json

@@ -13,6 +13,16 @@
       "matchStrings": [
         "\\s*image\\s*=\\s*\\\"(?<depName>.*?):(?<currentValue>.*?)\\\""
       ]
+    },
+    {
+      "customType": "regex",
+      "datasourceTemplate": "docker",
+      "fileMatch": [
+        "\\.tf$"
+      ],
+      "matchStrings": [
+        "#\\s?renovate:\\s?image=(?<depName>.*?)\\s?\\\"\\w+\\\"\\s?=\\s?\\\"(?<currentValue>[\\w+\\.\\-]*)\""
+      ]
     }
   ]
 }