feat: 부하테스트용 힙/톰캣 스레드 설정을 환경변수로 제어 가능하게 변경

app.Dockerfile ENTRYPOINT를 shell form으로 바꿔 JAVA_OPTS를 반영하도록 하고,
docker-compose.yml blue/green에 JAVA_OPTS, SERVER_TOMCAT_THREADS_MAX 환경변수를 추가.
기본값은 -Xms512m -Xmx512m, 톰캣 스레드 10.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: seaniiio

backend/app.Dockerfile

@@ -3,4 +3,4 @@ COPY otel/opentelemetry-javaagent.jar /opentelemetry-javaagent.jar
 ARG JAR_FILE=turip-app/build/libs/*.jar
 COPY ${JAR_FILE} /turip-app.jar
 EXPOSE 8080
-ENTRYPOINT ["java", "-javaagent:/opentelemetry-javaagent.jar", "-Duser.timezone=Asia/Seoul", "-Xms256m", "-Xmx384m", "-jar", "/turip-app.jar"]
+ENTRYPOINT ["sh", "-c", "java -javaagent:/opentelemetry-javaagent.jar -Duser.timezone=Asia/Seoul ${JAVA_OPTS:--Xms512m -Xmx512m} -jar /turip-app.jar"]

backend/docker-compose.yml

@@ -22,6 +22,8 @@ services:
     environment:
       OTEL_SERVICE_NAME: turip-app
       OTEL_RESOURCE_ATTRIBUTES: "deployment.environment.name=${SPRING_PROFILES_ACTIVE:-unknown}"
+      JAVA_OPTS: ${JAVA_OPTS:-}
+      SERVER_TOMCAT_THREADS_MAX: ${SERVER_TOMCAT_THREADS_MAX:-10}
     networks:
       - turip-network
     volumes:
@@ -38,6 +40,8 @@ services:
     environment:
       OTEL_SERVICE_NAME: turip-app
       OTEL_RESOURCE_ATTRIBUTES: "deployment.environment.name=${SPRING_PROFILES_ACTIVE:-unknown}"
+      JAVA_OPTS: ${JAVA_OPTS:-}
+      SERVER_TOMCAT_THREADS_MAX: ${SERVER_TOMCAT_THREADS_MAX:-10}
     networks:
       - turip-network
     volumes: