title: How to upgrade nginx version in docker container
body: <p>I have built nginx docker container for 6 months. Nginx in docker container show : </p>
  
  <pre><code>nginx version: nginx/1.9.5
  </code></pre>
  
  <p>And docker images show: </p>
  
  <pre><code>xxx/nginx80lb_release   latest              2228a5d98be7        8 months ago        132.9 MB
  </code></pre>
  
  <p>And dockerfile which I have built docker image before: </p>
  
  <pre><code>FROM nginx:latest
  </code></pre>
  
  <p>Now, I want to upgrade to latest nginx 1.11.2 (latest). 
  I have searched in the google, but no luck. I don't want to rebuild docker image.</p>
  
  <p>How can I do this? Please give me some advices. </p>
  
  <p>Thank you!</p>