Unable to deploy to Heroku odeNode.js+Express N

I am building a site with Node.js and Express.

$git add.
$ git commit-am "Heroku"
$ herokur login
Enter email and password~~~~~~~~~~~~~~~
$ heroku addons:create heroku-postgresql:hobby-dev
$ git push heroku master

I am trying to deploy from Ubuntu to Heroku using the above steps.
You will receive the following messages and errors:

Counting objects: 12961, done.
Compressing objects: 100% (11964/11964), done.
fatal —Out of memory, malloc failed (tried to allocate 425298626 bytes)
fatal —The remote end hang up unexpectedly
fatal —The remote end hang up unexpectedly
fatal:write error:bad file descriptor

I wonder if the problem is that there are too many files.
Actually, I don't mean to git add. so many files.
I thought it might be because the file below node_modules is contained.
I tried to remove and commit as follows, but it didn't work.

 git rm --cached-r node_modules/
git commit-m "remove"

I'm a super beginner in Git, Node.js, and Heroku, so I don't care about anything
Please let me know if there is a possible cause.