Summary

Migrates the two-stage Dockerfile off the deprecated openjdk images (which have no Java 25 tags) to Eclipse Temurin, targeting Java 25. Scoped to the Dockerfile only — pom.xml/README/helm/k8s are handled by parallel PRs.

Image changes:

• Builder stage: maven:3.8.3-openjdk-17 → maven:3.9-eclipse-temurin-25
• Deployer stage: openjdk:17-alpine → eclipse-temurin:25-jre-alpine

Everything else (WORKDIR, COPY, mvn clean install -DskipTests=true, EXPOSE 8080, ENTRYPOINT, jar path) is unchanged. as → AS casing normalized.

Verification

Both tags were pulled and confirmed to report a 25.x JVM:

$ docker run --rm eclipse-temurin:25-jre-alpine java -version
openjdk version "25.0.3" 2026-04-21 LTS
OpenJDK Runtime Environment Temurin-25.0.3+9 (build 25.0.3+9-LTS)
OpenJDK 64-Bit Server VM Temurin-25.0.3+9 (build 25.0.3+9-LTS, mixed mode, sharing)

$ docker run --rm maven:3.9-eclipse-temurin-25 java -version
openjdk version "25.0.3" 2026-04-21 LTS
OpenJDK Runtime Environment Temurin-25.0.3+9 (build 25.0.3+9-LTS)
OpenJDK 64-Bit Server VM Temurin-25.0.3+9 (build 25.0.3+9-LTS, mixed mode, sharing)

Note: a full application image build is not exercised here (the pom.xml Java 25 upgrade lands in a separate parallel PR), per task scope.

Link to Devin session: https://app.devin.ai/sessions/827917edb31c4e9b8e22b5ba8fea9111
Requested by: @Colhodm

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