refactor/Updated Dockerfile

Dockerfile

-FROM maven:3-jdk-8-alpine as builder
+# Step 1: Build the application
+FROM maven:3.8.5-openjdk-17 AS build
 
-WORKDIR /usr/src/app
+# Set the working directory in the container
+WORKDIR /app
 
-COPY . /usr/src/app
-RUN mvn package
+# Copy the Maven pom.xml and source code into the container
+COPY pom.xml .
+COPY src ./src
 
-FROM openjdk:8-jre-alpine
+# Compile and package the application to an executable JAR
+RUN mvn clean package -DskipTests
 
-COPY --from=builder /usr/src/app/target/*.jar /app.jar
+# Step 2: Run the application
+FROM openjdk:17-slim
 
+# Set the deployment directory
+WORKDIR /app
+
+# Copy the JAR from the build stage to the run stage
+COPY --from=build /app/target/*.jar app.jar
+
+# Expose the port the app runs on
 EXPOSE 8080
 
-ENTRYPOINT ["java"]
-CMD ["-jar", "/app.jar"]
+# Run the application
+CMD ["java", "-jar", "app.jar"]
+