フォントで追加になったwoff2のMIME_TYPEが解釈できず、404エラーが発生する場合(ちゃんと開発ツールでエラー確認しないとわからないけど)

IISだったら

web.config

<system.webServer>
  <staticContent>
    <remove fileExtension=".woff" />
    <remove fileExtension=".woff2" />
    <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
    <mimeMap fileExtension=".woff2" mimeType="application/font-woff" />
  </staticContent>
</system.webServer>

Tomcatのだったら
web.xml

  <mime-mapping>
      <extension>wmz</extension>
      <mime-type>application/x-msmetafile</mime-type>
  </mime-mapping>
  <mime-mapping>
      <extension>woff</extension>
      <mime-type>application/x-font-woff</mime-type>
  </mime-mapping>
  <mime-mapping>
      <extension>woff2</extension>
      <mime-type>application/x-font-woff</mime-type>
  </mime-mapping>
  <mime-mapping>
      <extension>wpd</extension>
      <mime-type>application/vnd.wordperfect</mime-type>
  </mime-mapping>