update docker base images and reduce size

There were same base image and naming changes for the jetty and tomcat images plantuml-server uses => plantuml-server uses a pretty old and vulnerable images.

- update base images for jetty and tomcat
- add a alpine version for jetty (not tomcat has no official alpine version)
- add autoremove and clean commands after graphviz installation. This reduces the images by about ~280 MB

Dockerfile.jetty

@@ -1,4 +1,4 @@
-FROM maven:3-jdk-11-slim AS builder
+FROM maven:3-eclipse-temurin-11 AS builder
 
 COPY pom.xml /app/
 COPY src/main /app/src/main/
@@ -8,7 +8,7 @@ RUN mvn --batch-mode --define java.net.useSystemProxies=true package
 
 ########################################################################################
 
-FROM jetty:11.0.15-jre11-slim
+FROM jetty:11.0.15-jre11
 
 # Proxy and OldProxy need empty path segments support in URIs
 # Hence: allow AMBIGUOUS_EMPTY_SEGMENT
@@ -16,8 +16,10 @@ FROM jetty:11.0.15-jre11-slim
 RUN sed -i 's/# jetty\.httpConfig\.uriCompliance=DEFAULT/jetty.httpConfig.uriCompliance=DEFAULT,AMBIGUOUS_EMPTY_SEGMENT/g' /var/lib/jetty/start.d/server.ini
 
 USER root
+
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
+        curl \
         fonts-noto-cjk \
         libgd3 \
         && \
@@ -29,7 +31,6 @@ ARG GRAPHVIZ_VERSION=8.0.2
 ARG GRAPHVIZ_BUILD_DIR=/tmp/graphiz-build
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-        curl \
         build-essential \
         libexpat1-dev \
         libgd-dev \
@@ -49,6 +50,8 @@ RUN apt-get update && \
         libgd-dev \
         zlib1g-dev \
         && \
+    apt-get autoremove -y && \
+    apt-get clean & \
     rm -rf /var/lib/apt/lists/* && \
     rm -rf $GRAPHVIZ_BUILD_DIR
 
@@ -63,11 +66,11 @@ RUN rm -rf $WEBAPP_PATH && \
 COPY --from=builder /app/target/plantuml.war /plantuml.war
 COPY ROOT.jetty.xml $WEBAPP_PATH/ROOT.xml
 
-ENTRYPOINT ["/entrypoint.sh"]
 # Openshift https://docs.openshift.com/container-platform/4.9/openshift_images/create-images.html#images-create-guide-openshift_create-images
 USER root
 RUN chgrp -R 0 $JETTY_BASE &&   chmod -R g=u $JETTY_BASE
 RUN chgrp -R 0 /tmp &&   chmod -R g=u /tmp
 USER jetty
 
+ENTRYPOINT ["/entrypoint.sh"]
 VOLUME ["/tmp/jetty"]