title: docker build: returned a non-zero code: 127**
body: <p>My docker file is </p>
  
  <pre><code>FROM alpine:3.4
  #RUN apk update &amp;&amp; RUN apk add curl &amp;&amp; RUN apk add vim &amp;&amp; RUN apk add git 
  RUN apk update
  RUN apk add curl
  RUN apk add vim
  RUN apk add git  
  </code></pre>
  
  <p>I am able to execute it</p>
  
  <p>when I change this dockerfile to </p>
  
  <pre><code>FROM alpine:3.4
  RUN apk update &amp;&amp; RUN apk add curl &amp;&amp; RUN apk add vim &amp;&amp; RUN apk add git 
  </code></pre>
  
  <p>Getting error:</p>
  
  <pre><code>/bin/sh: RUN: not found
  The command '/bin/sh -c apk update &amp;&amp; RUN apk add curl &amp;&amp; RUN apk add vim &amp;&amp; 
  RUN apk add git' returned a non-zero code: 127
  </code></pre>
  
  <p>What am I missing. I am new to docker.</p>