Add Renovate for dependency management (#210)

.github/renovate.json

@@ -0,0 +1,58 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "rebaseWhen": "behind-base-branch",
+  "dependencyDashboard": true,
+  "labels": ["dependencies", "no-stale"],
+  "commitMessagePrefix": "⬆️",
+  "commitMessageTopic": "{{depName}}",
+  "regexManagers": [
+    {
+      "fileMatch": ["/Dockerfile$", "/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][a-z0-9-_]+)=(?<currentValue>[a-z0-9-_.]+)\\s+"
+      ],
+      "versioningTemplate": "loose",
+      "datasourceTemplate": "repology",
+      "depNameTemplate": "alpine_3_17/{{package}}"
+    },
+    {
+      "fileMatch": ["/Dockerfile$"],
+      "matchStrings": [
+        "ARG LIBRESPOT_VERSION=[\"']?(?<currentValue>.+?)[\"']?\\s+"
+      ],
+      "datasourceTemplate": "crate",
+      "depNameTemplate": "librespot"
+    }
+  ],
+  "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": ["crate"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    }
+  ]
+}

spotify/Dockerfile

@@ -6,6 +6,7 @@ FROM ${BUILD_FROM}
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # Setup base
+ARG LIBRESPOT_VERSION="0.4.2"
 # hadolint ignore=DL3003
 RUN \
     apk add --no-cache --virtual .build-dependencies \
@@ -24,7 +25,7 @@ RUN \
         --features pulseaudio-backend \
         --root /usr \
         --bin librespot \
-        --version 0.4.2 \
+        --version "${LIBRESPOT_VERSION}" \
         --verbose \ 
         -- librespot \
     \