Dockerfile

# Build stage
FROM eclipse-temurin:21-jdk-jammy AS build
WORKDIR /app

# Copy maven files first to cache dependencies
COPY mvnw .
COPY .mvn .mvn
COPY pom.xml .

# Make the mvnw script executable
RUN chmod +x mvnw

# Download dependencies
RUN ./mvnw dependency:go-offline -B

# Copy source code
COPY src src

# Build the application
RUN ./mvnw package -DskipTests

# Runtime stage
FROM eclipse-temurin:21-jre-jammy
WORKDIR /app

# Copy the built artifact from build stage
COPY --from=build /app/target/*.jar app.jar

# Create a non-root user
RUN groupadd -r spring && useradd -r -g spring spring
USER spring:spring

# Set the entrypoint
ENTRYPOINT ["java", "-jar", "app.jar"]

# Document that the container listens on port 8080
EXPOSE 8080

# Add health check
HEALTHCHECK --interval=30s --timeout=3s \
  CMD curl -f http://localhost:8080/health || exit 1