Create Dockerfile

Dockerfile

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+# Step 1: Build the application using Maven
+FROM maven:3.9.5-eclipse-temurin-8 AS build
+
+# Set working directory inside the container
+WORKDIR /app
+
+# Copy project files
+COPY pom.xml ./
+COPY src ./src
+
+# Build the application and skip tests
+RUN mvn clean package -DskipTests
+
+# Step 2: Use a lightweight JRE image to run the application
+FROM openjdk:8-jre-slim
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy the built JAR file from the build stage
+COPY --from=build /app/target/BankingApp-0.0.1-SNAPSHOT.jar app.jar
+
+# Expose the application's port
+EXPOSE 8080
+
+# Add environment variables for database connection
+ENV SPRING_DATASOURCE_URL=jdbc:mysql://mysql-container:3306/OnlineBanking??useSSL=false
+ENV SPRING_DATASOURCE_USERNAME=root
+ENV SPRING_DATASOURCE_PASSWORD=root
+
+# Override the entrypoint to run the Java application
+ENTRYPOINT []
+
+# Default command to run the JAR file
+CMD ["java", "-jar", "app.jar"]