title: RUN command throws "not found"
body: <p>I have Docker file:</p>
  
  <pre><code>FROM ubuntu:18.04
  COPY mylib/src /usr/src
  WORKDIR /usr/src
  RUN chmod +x configure.sh
  RUN ls -l # it display all files, included configure.sh
  RUN ./configure.sh # error there
  </code></pre>
  
  <p>Echo:</p>
  
  <pre><code>RUN ls -l
   ---&gt; Running in d9ba6b10ed2a
  total 604
  ...
  -rwxr-xr-x 1 root root     91 Oct 28 07:30 configure.sh
  ...
  RUN ./configure.sh
   ---&gt; Running in 2e3e8fdca28e
  /bin/sh: 1: ./configure.sh: not found
  The command '/bin/sh -c ./configure.sh' returned a non-zero code: 127
  </code></pre>
  
  <p>File configure.sh exists, but an error occurs: not found</p>
  
  <p>I have this problem only on my Windows PC.</p>