Refactor Dockerfile ARG declarations for better organization and add renovate configuration for automated dependency updates

Dockerfile

@@ -3,8 +3,19 @@ FROM ${NODE_IMAGE} AS webssh2-builder
 
 ENV DEBIAN_FRONTEND=noninteractive
 
+# renovate: datasource=github-releases depName=janosmiko/lfk
+ARG LFK_VERSION=0.14.9
+# renovate: datasource=github-releases depName=kubernetes/kubectl
+ARG KUBECTL_VERSION=1.31.0
+# renovate: datasource=github-releases depName=helm/helm
+ARG HELM_VERSION=3.16.2
+# renovate: datasource=github-releases depName=derailed/k9s
+ARG K9S_VERSION=0.40.10
+# renovate: datasource=github-releases depName=billchurch/webssh2
 ARG WEBSSH2_VERSION=5.0.1
 
+
+
 RUN apt-get update \
     && apt-get install -y --no-install-recommends ca-certificates curl \
     && rm -rf /var/lib/apt/lists/* \
@@ -21,11 +32,6 @@ RUN apt-get update \
 
 FROM debian:trixie-slim
 
-ARG LFK_VERSION=0.14.9
-ARG KUBECTL_VERSION=1.31.0
-ARG HELM_VERSION=3.16.2
-ARG K9S_VERSION=0.40.10
-ARG WEBSSH2_VERSION=5.0.1
 
 ENV DEBIAN_FRONTEND=noninteractive \
     WEB_SSH_PORT=3000 \

renovate.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": ["/^Dockerfile$/", "/Dockerfile.*/"],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)\\s+ARG .*?_VERSION=(?<currentValue>.*)\\s"
+      ],
+      "datasourceTemplate": "{{{datasource}}}"
+    }
+  ]
+}