heroku node.js Procfile worker: node

I have a heroku node.js app and I have the following folder structure:

.git
app
node_modules
.env
.gitignore
package.json
Procfile

package.json:

{
  "name": "test",
  "description": "test bot",
  "version": "1.0.0",
  "main": "app/scripts/main.js",
  "devDependencies": {
    "discord.js": "latest",
  },
  "author": "Me",
  "license": "ISC",
  "dependencies": {
    "discord.js": "^11.0.0"
  }
}

Procfile:

worker: node .

node . works just fine locally in the git window, but it doesn't seem to be working on the heroku server.

I see worker.1: crashed 2017/03/12 15:37:57 -0400 (~ 20s ago) if I do heroku ps.

I'm guessing the worker: node . doesn't work properly? My main.js script is located in the folder structure like so: app/scripts/main.js.

Thoughts?

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