PNG diagram
Example
The following is a PNG based drawio diagram:
You can open the diagram as an PNG in your browser. Click here.
If the PNG file contains no mxfile information, then it'll fail and fall back to displaying the PNG file:
With the following server warning:
WARNING - Warning: PNG file 'missing-mxfile.drawio.png' on path '/tmp/mkdocs_avmpk9qy/tests/png' missing mxfile metadata
