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# Multi-stage build for Spring Boot application
FROM eclipse-temurin:17-jdk AS builder
# Set working directory
WORKDIR /app
# Copy gradle files
COPY gradlew .
COPY gradle gradle
COPY build.gradle .
COPY settings.gradle .
# Make gradlew executable
RUN chmod +x ./gradlew
# Copy source code
COPY src src
# Build the application
RUN ./gradlew build -x test
# Final stage
# 더 가벼운 런타임 전용 JRE 이미지를 사용 (공식 temurin)
FROM eclipse-temurin:17-jre
# Set working directory
WORKDIR /app
# 비루트 사용자 생성 (보안 강화)
RUN addgroup --system spring && adduser --system --group spring
# Healthcheck를 위해 curl 설치 (비루트 전환 전 설치)
RUN apt-get update \
&& apt-get install -y --no-install-recommends curl \
&& rm -rf /var/lib/apt/lists/*
# Copy the built jar from builder stage (boot JAR만 복사)
# 예) app-0.0.1-SNAPSHOT.jar
COPY --from=builder /app/build/libs/*-SNAPSHOT.jar app.jar
# 권한 변경 후 비루트 사용자로 전환
RUN chown -R spring:spring /app
USER spring
# Expose port
EXPOSE 8080
# 실행 프로파일 설정 (필요한 환경변수는 컨테이너 실행 시 주입)
ENV SPRING_PROFILES_ACTIVE=prod
# Healthcheck (Spring Actuator 사용 시 권장)
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
CMD curl -fsS http://localhost:8080/actuator/health || exit 1
# Run the application
ENTRYPOINT ["java", "-jar", "app.jar"]
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