Update Dockerfile base image (#18)

* Update Dockerfile base image

* Update Dockerfile

Author: Chorro

docker/build/Dockerfile

@@ -1,9 +1,8 @@
-FROM java:openjdk-8-jre
+FROM openjdk:8-jre-slim
 
 MAINTAINER agomez@wizzie.io
 
-RUN apt-get update
-RUN apt-get install -y gettext-base
+RUN apt-get update -y && apt-get install -y gettext-base && rm -rf /var/lib/apt/lists/*
 
 RUN mkdir -p /var/log/reputation-otx
 
@@ -14,14 +13,13 @@ ADD log4j2.xml /opt/reputation-otx/config/
 ADD config_env.json /opt/reputation-otx/config/
 ADD otx-service-start.sh /bin
 
-ENV METRIC_ENABLE true
-ENV METRIC_INTERVAL 60000
-ENV INTERVAL_MS 1800000
-ENV REPUTATION_TOPIC otx-reputation
-ENV BOOTSTRAP_KAFKA_TOPICS [\"__reputation_otx_bootstrap\"]
-ENV METRIC_KAFKA_TOPIC __metrics
-
-ENV JVM_OPTIONS -Xmx512m -Xms512m
+ENV METRIC_ENABLE=true \
+    METRIC_INTERVAL=60000 \
+    INTERVAL_MS=1800000 \
+    REPUTATION_TOPIC=otx-reputation \
+    BOOTSTRAP_KAFKA_TOPICS=[\"__reputation_otx_bootstrap\"] \
+    METRIC_KAFKA_TOPIC=__metrics \
+    JVM_OPTIONS="-Xmx512m -Xms512m"
 
 CMD /bin/otx-service-start.sh