FROM openjdk:8-jdk-alpine
ENV TZ=Asia/Shanghai
RUN set -eux; \
    ln -snf /usr/share/zoneinfo/$TZ /etc/localtime; \
    echo $TZ > /etc/timezone
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]
# docker build --build-arg JAR_FILE=thymeleaf-demo.jar -t harbor.dameng.io/library/thymeleaf-demo:0906 .

参考链接：
​​​https://spring.io/guides/topicals/spring-boot-docker/​​​​​​

​​编写java应用dockerfile的正确方式​​