title: When trying to build docker image, I get ""gcc": executable file not found in $PATH"
body: <p>I have gcc on windows. </p>
  
  <pre><code>C:\Users\jkrov&gt;gcc --version
  gcc (MinGW.org GCC-8.2.0-5) 8.2.0
  Copyright (C) 2018 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  </code></pre>
  
  <p>My docker file:</p>
  
  <pre><code>FROM golang:alpine
  RUN mkdir /app
  WORKDIR /app
  ADD . /app
  RUN go build -o main .
  EXPOSE 8080
  CMD [ "app/main" ]
  </code></pre>
  
  <p>When I try to build image I get error:</p>
  
  <pre><code>exec: "gcc": executable file not found in $PATH
  </code></pre>