Steps to Reproduce

<button iconSclass="z-icon-home"/>

1. check developer tool > network tab
2. check the response header "content-type" of all request to *.eot and *.woff

Current Result

Content-Type: ;charset=UTF-8;

Expected Result

svg = svn:mime-type=image/svg+xml
ttf = svn:mime-type=application/x-font-ttf
otf = svn:mime-type=application/x-font-opentype
woff = svn:mime-type=application/font-woff
woff2 = svn:mime-type=application/font-woff2
eot = svn:mime-type=application/vnd.ms-fontobject
sfnt = svn:mime-type=application/font-sfnt

Debug Information

• This issue is found by web inspector
• zk built-in CSS contains multiple URL of fonts, please fix them all