Updated docker image

Author: oharsta

server/docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipse-temurin:8-jdk-alpine
+FROM eclipse-temurin:21-jdk-alpine
 RUN apk --update upgrade && apk add openssl openssl-dev ca-certificates libgcc && update-ca-certificates
 COPY target/*.jar app.jar
 ENTRYPOINT ["java","-jar","/app.jar"]