I want to be able to see the ruby on rails by pushing netlify.

I would like to be able to view the photo posting application created by ruby on rails using netlify for my portfolio.

 git init
git add.
git commit-m "pixcelgram"
git push-u origin master

Then use netlify https://app.netlify.com to

Press the New site from git button

If you press the GitHub button in the lower left corner, it will fly to my github and select pixelgram

https://gyazo.com/87834113636ad8f7c604ef4d62d1050a
If you leave Basic build setting empty and deploy advanced,

https://gyazo.com/dba57b42dcb345c02c3fc21ac8b7e31a

It will be

What's wrong?

Do I have to put something set with rails in the basic build setting?
I would appreciate it if you could let me know.