Use release build for djl-serving docker (#1102)

Change-Id: Ic0ec57d896c1e295fc7577ce7618dd945bcb48d3

serving/serving/docker/Dockerfile

@@ -1,22 +1,20 @@
 FROM ubuntu:18.04
+ARG djl_version=0.12.0
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
     fakeroot \
-    openjdk-8-jdk-headless
+    openjdk-8-jdk-headless \
+    curl
+
+RUN curl -O https://publish.djl.ai/djl-serving/djl-serving_${djl_version}-1_all.deb && \
+    dpkg -i djl-serving_${djl_version}-1_all.deb && \
+    rm djl-serving_${djl_version}-1_all.deb
 
 RUN mkdir -p /opt/djl
+COPY config.properties /opt/djl/conf/
 
 COPY dockerd-entrypoint.sh /usr/local/bin/dockerd-entrypoint.sh
-COPY config.properties /opt/djl/
-COPY serving /opt/djl/tmp
-
-RUN cd /opt/djl/tmp \
-    && ./gradlew copyLibs \
-    && cd .. \
-    && rm -rf tmp \
-    && rm -rf ~/.gradle
-
 RUN chmod +x /usr/local/bin/dockerd-entrypoint.sh
 
 EXPOSE 8080
@@ -29,6 +27,7 @@ ENV TF_NUM_INTRAOP_THREADS=1
 ENV TF_CPP_MIN_LOG_LEVEL=1
 ENV MXNET_ENGINE_TYPE=NaiveEngine
 ENV JAVA_OPTS="-Dai.djl.pytorch.num_interop_threads=1"
+ENV MODEL_SERVER_HOME=/opt/djl
 
 ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh"]
 CMD ["serve"]

serving/serving/docker/dockerd-entrypoint.sh

@@ -3,10 +3,7 @@ set -e
 
 if [[ "$1" = "serve" ]]; then
     shift 1
-    java $JAVA_OPTS -cp "libs/*" ai.djl.serving.ModelServer "$APP_ARGS"
+    /usr/bin/djl-serving "$@"
 else
     eval "$@"
 fi
-
-# prevent docker exit
-tail -f /dev/null