title: spring boot log file being overwritten on restart
body: <p>I'm using <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/deployment-install.html" rel="nofollow">https://docs.spring.io/spring-boot/docs/current/reference/html/deployment-install.html</a> to start my spring-boot application on ubuntu 14.04 and it's working great except my log file gets overwritten whenever I restart the app.  Probably it's something simple... but how can I configure that behaviour?  I'm just using the default console logging to /var/log/app_name.log.  If I pass in the logback "--logging.file=..." config to the init script, it logs both to the default as well as this file and this file doesn't get overwritten.  Thanks!</p>