A backend for the mrkdown iOS and Android apps designed to be run on the DigitalOcean App Platform.
You'll need Node.js to run this. I'm currently testing with v20.16.0.
The app will listen on the port specified in the PORT environment variable,
but will listen on port 1037 by default.
The environment variable TUMBLR_CLIENT_ID will need to be set to the consumer
key you get from
registering an application with Tumblr.
Additionally, the environment variable TUMBLR_CLIENT_SECRET will need to be
set to the consumer secret from the same Tumblr application that was
registered.