title: Failed to craeate Dockerfile image /bin/sh: apt-get: not found
body: <p>HI can I ask some help I'm building the image Dockerfile
  but I get this error <code>/bin/sh: apt-get: not found</code> , I did not pull O.S because I know docker has a default O.S ?</p>
  
  <pre><code>Executing busybox-1.31.1-r9.trigger
  OK: 12 MiB in 31 packages
  Removing intermediate container 9a28ea5578ed
   ---&gt; 73b493dcd606
  Step 3/7 : RUN apt-get update    &amp;&amp;  apt-get install –y nginx
   ---&gt; Running in 9e2bb52cd7c8
  /bin/sh: apt-get: not found
  The command '/bin/sh -c apt-get update    &amp;&amp;  apt-get install –y nginx' returned a non-zero code: 127
  
  
  
  
  FROM php:7.4-fpm-alpine
  #RUN docker-php-ext-install pdo
  RUN docker-php-ext-install pdo_mysql
  RUN apt-get update \
     &amp;&amp;  apt-get install –y nginx
  
  COPY index.php /var/www/myapp
  ADD default.conf /etc/nginx/conf.d/default.conf
  
  EXPOSE 80
  CMD ["nginx", "-g", "daemon off;"]
  </code></pre>