chore(docker): switch runtime to eclipse-temurin:25-jre-alpine (#307)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

CHANGELOG.md

@@ -44,6 +44,11 @@ Release names follow the **historic football clubs** naming convention (A–Z):
 
 ### Changed
 
+- Switch runtime base image from `eclipse-temurin:25-jdk-alpine` to
+  `eclipse-temurin:25-jre-alpine` to reduce image size by dropping compiler
+  toolchain (`javac`, `jshell`, debug utilities) while retaining the full JVM
+  (#307)
+
 ### Fixed
 
 ### Removed

Dockerfile

@@ -19,7 +19,7 @@ RUN mvn clean package -DskipTests
 # Stage 2: Runtime
 # This stage creates the final, minimal image to run the application.
 # ------------------------------------------------------------------------------
-FROM eclipse-temurin:25-jdk-alpine AS runtime
+FROM eclipse-temurin:25-jre-alpine AS runtime
 
 WORKDIR /app