chore: Configure Renovate (#3923)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Geoff Bourne <itzgeoff@gmail.com>

.github/workflows/build.yml

@@ -17,6 +17,7 @@ on:
       - "compose-docs.yml"
       - "zensical.toml"
       - ".readthedocs.yaml"
+      - "renovate.json"
 
 jobs:
   build:

.github/workflows/verify-pr.yml

@@ -14,6 +14,7 @@ on:
       - "compose-docs.yml"
       - "zensical.toml"
       - ".readthedocs.yaml"
+      - "renovate.json"
 
 jobs:
   build:

Dockerfile

@@ -49,7 +49,7 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --var version=${MC_SERVER_RUNNER_VERSION} --var app=mc-server-runner --file {{.app}} \
   --from ${GITHUB_BASEURL}/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
-
+# renovate: datasource=github-releases depName=itzg/mc-image-helper versioning=loose
 ARG MC_HELPER_VERSION=1.54.0
 ARG MC_HELPER_BASE_URL=${GITHUB_BASEURL}/itzg/mc-image-helper/releases/download/${MC_HELPER_VERSION}
 # used for cache busting local copy of mc-image-helper

renovate.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": ["/^Dockerfile$/"],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))? packageName=(?<packageName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=(?<currentValue>.+?)\\s"
+      ]
+    }
+  ]
+}