🚀 fix: Dockerfile 빌드/실행 스테이지 분리

purithm/Dockerfile

@@ -1,4 +1,11 @@
-FROM openjdk:17
-VOLUME /tmp
+# Build Stage
+FROM openjdk:17 AS build
+WORKDIR /app
 COPY /build/libs/*SNAPSHOT.jar app.jar
+
+# Run Stage
+FROM openjdk:17-jdk-slim
+WORKDIR /app
+COPY --from=build /app/app.jar app.jar
+VOLUME /tmp
 ENTRYPOINT ["java","-jar","/app.jar"]