Merge pull request #11 from musabbozkurt/dockerfile-changes

Update Dockerfile to decrease the size of image

Dockerfile

@@ -11,14 +11,27 @@ COPY .. ${PROJECT_DIR}
 # Download dependencies (this layer will be cached if pom.xml doesn't change)
 RUN --mount=type=cache,target=/root/.m2 mvn -f $PROJECT_DIR/pom.xml clean package -DskipTests
 
+# Create a custom Java runtime
+RUN $JAVA_HOME/bin/jlink \
+         --add-modules jdk.unsupported,java.base,java.sql,java.naming,java.desktop,java.management,java.security.jgss,java.instrument \
+         --strip-debug \
+         --no-man-pages \
+         --no-header-files \
+         --compress=2 \
+         --output /mbjavaruntime
+
 ### Package stage ###
 
 # Use an official OpenJDK image as the base image
-FROM openjdk:21-jdk-slim
+FROM debian:stretch-slim
 
 ENV PROJECT_NAME=inventory-management-service
 ENV PROJECT_JAR_FILE_NAME=${PROJECT_NAME}-0.0.1-SNAPSHOT
 ENV PROJECT_DIR=/home/projects/${PROJECT_NAME}
+ENV JAVA_HOME /home/java/jdk21
+ENV PATH $JAVA_HOME/bin:$PATH
+
+COPY --from=maven-builder /mbjavaruntime $JAVA_HOME
 
 # Define the location of the New Relic agent JAR
 ARG NEW_RELIC_AGENT_JAR_PATH