setup renovate

Dockerfile

@@ -6,8 +6,9 @@ LABEL maintainer="Robert Kaussow <mail@geeklabor.de>" \
     org.label-schema.vendor="Robert Kaussow" \
     org.label-schema.schema-version="1.0"
 
-ARG BUILD_VERSION=master
-ENV FRESHRSS_VERSION="${BUILD_VERSION:-master}"
+ARG BUILD_VERSION
+# renovate: datasource=github-releases depName=FreshRSS/FreshRSS
+ENV FRESHRSS_VERSION="${BUILD_VERSION:-v1.16.0}"
 
 ADD overlay/ /
 

renovate.json

@@ -1,6 +1,13 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:base"
+  "extends": ["config:base"],
+  "ignorePresets": [":prHourlyLimit2"],
+  "regexManagers": [
+    {
+      "fileMatch": ["^Dockerfile$"],
+      "matchStrings": [
+        "datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\sENV .*?_VERSION=\"\\${.*:-(?<currentValue>.*)}\"\\s"
+      ]
+    }
   ]
 }