Dockerfile文件：设置变量启动的时候传递进去

from openjdk:8-jdk-alpine
RUN ln -sf /usr/share/zoneinfo/Asia/shanghai /etc/localtime
RUN echo 'Asia/shanghai' > /etc/timezone
ADD target/demo-0.0.1-SNAPSHOT.jar demo-0.0.1-SNAPSHOT.jar
# spring.profiles.active指定启动环境
EXPOSE 8080
ENTRYPOINT java ${limit} -jar /demo-0.0.1-SNAPSHOT.jar