Use env var for cookie secret
Cleanup
Get database URL out of env if present
Prepare for Heroku. Upgrade dependencies
Generate Procfile and project.clj for Heroku
Heroku wants a snapshot version
Add environ dependency
Add assets to committed files
Use environ to get the port
Ignore boot-generated files
Make sure $PORT is passed in via Procfile
Require environ library
Add simple routing to serve index.html on /
No dice; try this trick
Shift handler down
Environ uses hyphens
master branch ignores these generated files