Update Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM gradle:9.6-jdk23 AS builder
+FROM gradle:9.6-jdk21 AS builder
 WORKDIR /app
 RUN --mount=type=secret,id=TOKEN,target=/run/secrets/TOKEN \
     export SECRET_VALUE=$(cat /run/secrets/TOKEN) && \
@@ -9,8 +9,7 @@ WORKDIR /app/target
 FROM mongo:latest AS Runner
 # Install Java 21 (using Debian/Ubuntu base of the Mongo image)
 RUN apt-get update && apt-get install -y \
-    openjdk-23-jre \
-    && rm -rf /var/lib/apt/lists/*
+    openjdk-21-jre \
 
 # Copy the built JAR from the builder stage
 # WORKDIR /app