title: Create Custom Docker Alpine Image
body: <p>I am creating a customize Dockerfile by installing few drawing packages. I cannot install libgdiplus-dev package in Dockerfile. I have tried adding a mirror URL <a href="https://pkgs.alpinelinux.org/package/edge/testing/armhf/libgdiplus-" rel="nofollow noreferrer">https://pkgs.alpinelinux.org/package/edge/testing/armhf/libgdiplus-</a> (mirrors can be found in this URL) dev in the Dockerfile but it did not help.</p>
  
  <pre><code>FROM alpine:3.7  
  RUN apk add --no-cache libgdiplus-dev  
  </code></pre>
  
  <p>Running above command ends me up saying  </p>
  
  <pre><code>libgdiplus-dev (missing):  
  required by: world[libgdiplus-dev]
  </code></pre>