Gemfile.lock required. Please check it in - ruby

Question

Counting objects: 11, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (8/8), done.
Writing objects: 100% (11/11), 3.82 KiB | 1.91 MiB/s, done.
Total 11 (delta 0), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/NoLockfile
remote:
remote: !
remote: ! Gemfile.lock required. Please check it in.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to aqueous-reaches-83684.
remote:
To https://git.heroku.com/aqueous-reaches-83684.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/aqueous-reaches-83684.git'
I want to launch my application on heroku
I always have one and the same mistake:
Gemfile.lock required. Please check it in.
I did everything according to the instructions! Deleted, downloaded, does not work anyway
Used
bundle install
Still the same error

Answer 1

Make sure you add your Gemfile.lock to source control.
Considering you are on master branch:
git add Gemfile.lock
git commit -m "Commit Gemfile.lock"
git push heroku master
Otherwise:
git push heroku current_branch:master
If it doesn't work, you probably have it ignored in your .gitignore file.
Remove Gemfile.lock or *.lock from your ignored list and repeat the commands above.