Help setting up Ruby on Rails, GitHub and Heroku

I'm starting to learn Rails. I've created a basic project in Atom, registered with git, uploaded to GitHub, and now need to push to Heroku but am getting errors.

Need some help troubleshooting please! Ideally to remote into my laptop and let me see how to fix.


DETAILS: command line errors....

floraheathcote@Floras-Air hello_world2 % git push heroku main
Enumerating objects: 118, done.
Counting objects: 100% (118/118), done.
Delta compression using up to 4 threads
Compressing objects: 100% (100/100), done.
Writing objects: 100% (118/118), 150.42 KiB | 5.01 MiB/s, done.
Total 118 (delta 12), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: ! Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used.
remote: Detected buildpacks: Ruby,Node.js
remote: See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order
remote: -----> Ruby app detected
remote: -----> Installing bundler 2.1.4
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.6.6
remote: -----> Installing dependencies using bundler 2.1.4
remote: Running: BUNDLE_WITHOUT='foo:bar' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote: The dependency byebug (= 11.0.1) will be unused by any of the platforms Bundler is installing for. Bundler is installing for x86_64-darwin-19 but the dependency is only for ruby, x86-mingw32, x64-mingw32. To add those platforms to the bundle, run `bundle lock --add-platform ruby x86-mingw32 x64-mingw32`.
remote: The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for x86_64-darwin-19 but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
remote: Unable to find a spec satisfying byebug (= 11.0.1) in the set. Perhaps the
remote: lockfile is corrupted?
remote: Bundler Output: The dependency byebug (= 11.0.1) will be unused by any of the platforms Bundler is installing for. Bundler is installing for x86_64-darwin-19 but the dependency is only for ruby, x86-mingw32, x64-mingw32. To add those platforms to the bundle, run `bundle lock --add-platform ruby x86-mingw32 x64-mingw32`.
remote: The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for x86_64-darwin-19 but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
remote: Unable to find a spec satisfying byebug (= 11.0.1) in the set. Perhaps the
remote: lockfile is corrupted?
remote:
remote: !
remote: ! Failed to install gems via Bundler.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to cryptic-falls-09816.
remote:
To https://git.heroku.com/cryptic-falls-09816.git
! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/cryptic-falls-09816.git'
floraheathcote@Floras-Air hello_world2 %