The best approach would be to move your png over to the content server and reference it there, but if that's not an option - there's the base64 fallback. The 'trick' is to know that image files (such as a png) can be converted and read into your <img> tag as text - as explained in this communities post, the syntax is like: <img src="data:image/png;base64,R0lGODlhEAAQAKL/AP//////
AMDAwMDAwICAgICA\AAAAAAAAACH5BAEAAAIALAAAAAAQAB
AAAANFKEpMpjAKAkYYTkJqu2sbII6kSCzApXbqM1VrPLiUWpYGFwB
F7/+51ID3KwaHReNrlwS+iM0CTRTtTavSjWHL7W41YE0CADs="> But how do you get your dashboard converted to base64 encoding? Thankfully Michael Dixon has a SAS script that will do just that, check out this post. Hopefully this will get you on your way.
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