############################

# Stage 1: Build Stage

############################

FROM maven:3.9.1-eclipse-temurin-17 AS build

# Build-time argument

ARG APP_VERSION=1.0.0

# Set working directory

WORKDIR /app

# Copy only pom.xml first to leverage Docker cache

COPY pom.xml .

# Download dependencies for caching

RUN mvn dependency:go-offline -B

# Copy source code

COPY src ./src

# Build the project, skip tests for faster build

RUN mvn clean package -DskipTests

############################

# Stage 2: Runtime Stage

############################

FROM eclipse-temurin:17-jre-jammy

# Labels for metadata

LABEL maintainer="[email protected]" \

version="1.0" \

description="Spring Boot Java Application"

# Runtime argument (can override at build-time)

ARG APP_VERSION=1.0.0

# Set working directory

WORKDIR /app

# Create non-root user

RUN useradd -m appuser

USER appuser

# Copy built JAR from build stage

COPY --from=build /app/target/*.jar app.jar

# Expose the application port

EXPOSE 8080

# Environment variables

ENV JAVA_OPTS="-Xms512m -Xmx1024m" \

SPRING_PROFILES_ACTIVE=prod \

APP_VERSION=${APP_VERSION}

# Optional volume for logs/config

VOLUME ["/app/config", "/app/logs"]

# Health check

HEALTHCHECK --interval=30s --timeout=5s --start-period=30s \

CMD curl -f http://localhost:8080/actuator/health || exit 1

# Default arguments (can be overridden at runtime)

CMD ["--server.port=8080"]

# Entrypoint

ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -jar app.jar $0"]