When I go to build my application on Heroku, the install step is not installing all of my dependencies.
For example, my Heroku logs will output:
Installing node modules added 60 packages in 3.918s
However, I should have more node modules being installed.
package-lock.json for your app is out of date. Locally, run
npm install and make sure the changes to the
package-lock.json are checked into git and made available to Heroku.