For Java 25, you have several options

Eclipse Temurin

Eclipse Temurin now provides Java 25 images. You can use:

eclipse-temurin:25-jre (runtime only)

eclipse-temurin:25-jdk (full JDK)

Amazon Corretto

Amazon Corretto also supports Java 25:

amazoncorretto:25 (JDK)

amazoncorretto:25-alpine (Alpine-based, smaller image)

Since you're currently using the JRE variant of Temurin 21, the most straightforward upgrade path would be:

# Change from

FROM eclipse-temurin:21-jre

# To

FROM eclipse-temurin:25-jre

If you want to try Corretto instead, note that they don't typically publish separate JRE images - their images include the full JDK. However, you could use a multi-stage build to extract just the JRE components if image size is a concern.

Both distributions are free, production-ready, and well-maintained. Temurin would give you the most similar experience to what you're currently using.