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Dockerfile

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+# Multi-stage build for FitPub application
+
+# Stage 1: Build the application
+FROM maven:3.9-eclipse-temurin-17 AS builder
+
+WORKDIR /build
+
+# Copy POM file first for better layer caching
+COPY pom.xml .
+
+# Download dependencies (cached if pom.xml hasn't changed)
+RUN mvn dependency:go-offline -B
+
+# Copy source code
+COPY src ./src
+
+# Build the application
+RUN mvn clean package -DskipTests -B
+
+# Stage 2: Create the runtime image
+FROM eclipse-temurin:17-jre-jammy
+
+WORKDIR /app
+
+# Install curl for healthcheck
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends curl && \
+    rm -rf /var/lib/apt/lists/*
+
+# Create non-root user for security
+RUN groupadd -r fitpub && useradd -r -g fitpub fitpub
+
+# Create directories for uploads and logs
+RUN mkdir -p /app/uploads /app/logs && \
+    chown -R fitpub:fitpub /app
+
+# Copy the built artifact from builder stage
+COPY --from=builder /build/target/*.jar /app/fitpub.jar
+
+# Change ownership
+RUN chown fitpub:fitpub /app/fitpub.jar
+
+# Switch to non-root user
+USER fitpub
+
+# Expose application port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:8080/actuator/health || exit 1
+
+# Run the application
+ENTRYPOINT ["java", \
+    "-XX:+UseContainerSupport", \
+    "-XX:MaxRAMPercentage=75.0", \
+    "-Djava.security.egd=file:/dev/./urandom", \
+    "-jar", \
+    "/app/fitpub.jar"]