ImageMagick7 cleanup
Cleanup Dockerfile from Imagemagick7 install experiments:
mkdir /root/imagemagick
cd /root/imagemagick
curl -fsSL https://imagemagick.org/download/releases/ImageMagick-7.0.8-15.tar.xz -o ImageMagick-7.0.8-15.tar.xz
curl: (22) The requested URL returned error: 404 Not Found