title: Heroku rake command
body: <p>I'm trying to push my Rails app to Heroku, and I'm at the point where I'm trying to create/migrate the database, but I cannot get the rake command to run.  Here's the message I'm getting:</p>
  
  <pre><code>$ heroku run rake db:migrate
  Running `rake db:migrate` attached to terminal... up, run.2439
  bash: rake: command not found
  </code></pre>
  
  <p>I spent a lot of time getting Postgres set up on my local machine, and it's working fine (was able to run rake commands without issue, and the app is running locally), but I don't know why I'm getting this error when I try to migrate the heroku database.  </p>