Add Renovate for dependency management (#170)

.github/dependabot.yaml

@@ -1,8 +0,0 @@
----
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: daily
-      time: "06:00"

.github/renovate.json

@@ -0,0 +1,59 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "rebaseWhen": "behind-base-branch",
+  "dependencyDashboard": true,
+  "labels": ["dependencies", "no-stale"],
+  "commitMessagePrefix": "⬆️",
+  "commitMessageTopic": "{{depName}}",
+  "regexManagers": [
+    {
+      "fileMatch": ["/Dockerfile$", "/build.yaml$"],
+      "matchStringsStrategy": "any",
+      "matchStrings": [
+        "ARG BUILD_FROM=(?<depName>.*?):(?<currentValue>.*?)\\s+",
+        "(aarch64|amd64|armhf|armv7|i386):\\s[\"']?(?<depName>.*?):(?<currentValue>.*?)[\"']?\\s"
+      ],
+      "datasourceTemplate": "docker"
+    },
+    {
+      "fileMatch": ["/Dockerfile$"],
+      "matchStringsStrategy": "any",
+      "matchStrings": [
+        "\\s\\s(?<package>[a-z0-9-]+)=(?<currentValue>[a-z0-9-_.]+)\\s+"
+      ],
+      "versioningTemplate": "loose",
+      "datasourceTemplate": "repology",
+      "depNameTemplate": "alpine_3_17/{{package}}"
+    },
+    {
+      "fileMatch": ["/Dockerfile$"],
+      "matchStrings": [
+        "ARG ZERO_TIER_ONE_VERSION=[\"']?(?<currentValue>.+?)[\"']?\\s+"
+      ],
+      "datasourceTemplate": "github-releases",
+      "depNameTemplate": "zerotier/ZeroTierOne"
+    }
+  ],
+  "packageRules": [
+    {
+      "matchDatasources": ["repology"],
+      "automerge": true
+    },
+    {
+      "groupName": "Add-on base image",
+      "matchDatasources": ["docker"]
+    },
+    {
+      "groupName": "Add-on base image",
+      "matchDatasources": ["docker"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    },
+    {
+      "matchDatasources": ["github-releases"],
+      "matchDepNames": ["zerotier/ZeroTierOne"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    }
+  ]
+}

zerotier/Dockerfile

@@ -6,6 +6,7 @@ FROM ${BUILD_FROM}
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # Setup base
+ARG ZERO_TIER_ONE_VERSION="1.10.4"
 # hadolint ignore=DL3003
 RUN \
     apk add --no-cache --virtual .build-dependencies \
@@ -20,7 +21,7 @@ RUN \
         libgcc=12.2.1_git20220924-r4 \
         libstdc++=12.2.1_git20220924-r4 \
     \
-    && git clone --branch "1.10.4" --depth=1 \
+    && git clone --branch "${ZERO_TIER_ONE_VERSION}" --depth=1 \
         "https://github.com/zerotier/ZeroTierOne.git" /tmp/zerotier \
     \
     && cd /tmp/zerotier \