try updating docker image

Author: dashpole

e2e.Dockerfile

@@ -13,13 +13,13 @@
 # limitations under the License.
 
 # Build relative to root of repository i.e. `docker build --file e2e.Dockerfile --tag=$tag ..`
-FROM gradle:8.0.2-jdk11 as builder
+FROM gradle:8.14.3-jdk11 as builder
 
 COPY --chown=gradle:gradle . /app/src
 WORKDIR /app/src
 RUN gradle :e2e-test-server:build
 
-FROM openjdk:11-jre-slim
+FROM eclipse-temurin:21
 COPY --from=builder /app/src/e2e-test-server/build/libs/*-all.jar /app/app.jar
 WORKDIR /app
 CMD java -jar app.jar