Deploy Rails app to Heroku detect app matching no buildpack - ruby-on-rails

Question

This might be a duplicate however, I could not fix it from those answers so any help will be appreciated.
Error
Failed to detect app matching no buildpack
After creating the Heroku app I set my buildpack (same error comes with heroku/ruby buildpack)
heroku buildpacks:set https://github.com/heroku/heroku-buildpack-ruby.git
Gemfile and Gemfile.lock are in the root folder.
Added ruby version and rails_12factor gem to Gem file.
PostgreSQL set to production.
ruby "2.3.0"
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.4'
group :development, :test do
gem 'sqlite3'
end
group :production, :test do
gem 'pg'
end
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc
gem 'kaminari'
gem 'soundcloud'
gem 'redis'
gem 'yt', '~> 0.28.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug'
end
group :development do
# Access an IRB console on exception pages or by using <%= console %> in views
gem 'web-console', '~> 2.0'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
end
gem 'rails_12factor', group: :production
.gitignore
/.bundle
# Ignore the default SQLite database.
/db/*.sqlite3
/db/*.sqlite3-journal
# Ignore all logfiles and tempfiles.
/log/*
!/log/.keep
/tmp
*.DS_Store