title: Use sudo inside Dockerfile (Alpine)
body: <p>I have this Dockerfile ...</p>
  
  <pre><code>FROM keymetrics/pm2:latest-alpine
  
  RUN apk update &amp;&amp; \
      apk upgrade &amp;&amp; \
      apk add \
         bash
  
  COPY . ./
  
  EXPOSE 1886 80 443
  
  CMD pm2-docker start --auto-exit --env ${NODE_ENV} ecosystem.config.js
  </code></pre>
  
  <p>How can I execute the <code>CMD</code> command using <code>sudo</code> ?</p>
  
  <p>I need to do this because the port 443 is allowed only for sudo user.</p>