Good job. Just tested it. The interface or design could use some work by someone good at that stuff. The functionality works as expected, though. I love the addition of the delete token and the whole self-hosted concept. Latter is main reason I looked at it. Ideal version of this app would be an easy-to-install, self-contained executable w/ a configuration file (and wizard).
Thanks for the feedback! I have considered creating an interactive installation script, but I figured most users would prefer more precise control over how the application is being installed and configured. I'll consider something like this as a future goal if there is sufficient demand.
(BTW: The "PHP" option looks to be busted, at least for me. Typing text makes the character count increase, but the text seems to be hidden. Other languages work fine. I'm using Chrome, Version 48.0.2564.103 m on a Windows 7 machine, FWIW.)
Thanks for the bug report! Turns out CodeMirror's HTML and PHP modes require the XML mode to also be loaded as a dependency. This is being tracked in https://github.com/LINKIWI/modern-paste/issues/4 if you're interested in following along.
