Optimised docker image

Author: Yong Sheng Tan

Dockerfile

@@ -1,6 +1,27 @@
-FROM ghcr.io/graalvm/jdk:21.3
+FROM amazoncorretto:17
+WORKDIR /build
+COPY ./target/*.jar /app/app.jar
+RUN cd /app && jar -xf app.jar && \
+    jdeps \
+    --ignore-missing-deps \
+    --print-module-deps \
+    -q \
+    --recursive \
+    --multi-release 17 \
+    --class-path="BOOT-INF/lib/*" \
+    --module-path="BOOT-INF/lib/*" \
+    app.jar > /deps
+RUN jlink \
+    --verbose \
+    --add-modules $(cat /deps),jdk.naming.dns,jdk.crypto.ec \
+    --strip-java-debug-attributes \
+    --no-man-pages \
+    --no-header-files \
+    --compress=2 \
+    --output /jre
+
+FROM gcr.io/distroless/java-base-debian11
+COPY --from=0 /jre /jre
 WORKDIR /data/symphony
 COPY ./target/*.jar app.jar
-RUN useradd symphony && chmod -R 755 /data/symphony
-USER symphony
-ENTRYPOINT [ "java", "-jar", "./app.jar", "--spring.profiles.active=prod" ]
+ENTRYPOINT [ "/jre/bin/java", "-jar", "./app.jar", "--spring.profiles.active=prod" ]