Rebuild Logstash, Elasticsearch

Setting static limits for Elasticsearch / Logstash on Xms, Xmx and Container RAM results in unwanted side effects for some installations. With Elastic supporting dynamic heap management for Java 14+ we now use OpenJDK 16 JRE and as such remove limitations. This should improve stability for T-Pot, provided the minimum requirements will be met.

docker/elk/logstash/Dockerfile

@@ -14,8 +14,9 @@ RUN apk -U --no-cache add \
 	     curl \
              libc6-compat \
              libzmq \
-             nss \
-             openjdk11-jre && \
+             nss && \
+#             openjdk16-jre && \
+    apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing openjdk16-jre && \
 #
 # Get and install packages
     mkdir -p /etc/listbot && \