append code to create html file in shell script
cat << EOF > ${WORKSPACE}/download.html
<html>
<body>
<h1>Download IPA Here</h1>
<a href="itms-services://?action=download-manifest&url=http://192.168.0.237:8080/job/$JOB_NAME/ws/manifest2.plist" mimeType="application/octet-stream">
<b>Install App</b>
</a>
</body>
</html>
EOF
and some changes to publish action show download file on artifacts.