Herokuへのデプロイ時のエラー解決

初めてのHerokuへのデプロイ時にエラーが出てしまったので解決までの流れをメモ。

# エラー内容
```console
% git push heroku app_name
```
上記コマンドでアプリをHerokuへデプロイしようとしたところ下記のエラーとなった。
```console
Enumerating objects: 130, done.
Counting objects: 100% (130/130), done.
Delta compression using up to 8 threads
Compressing objects: 100% (113/113), done.
Writing objects: 100% (130/130), 158.84 KiB | 9.34 MiB/s, done.
Total 130 (delta 3), reused 0 (delta 0), pack-reused 0
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Building on the Heroku-20 stack
remote: -----> Determining which buildpack to use for this app
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 2.3.10
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-3.0.0
remote: -----> Installing dependencies using bundler 2.3.10
remote:        Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote:        Your bundle only supports platforms ["arm64-darwin-21"] but your local platform
remote:        is x86_64-linux. Add the current platform to the lockfile with
remote:        `bundle lock --add-platform x86_64-linux` and try again.
remote:        Bundler Output: Your bundle only supports platforms ["arm64-darwin-21"] but your local platform
remote:        is x86_64-linux. Add the current platform to the lockfile with
remote:        `bundle lock --add-platform x86_64-linux` and try again.
remote: 
remote:  !
remote:  !     Failed to install gems via Bundler.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote:  !
remote:  ! ## Warning - The same version of this code has already been built: 58ad70f97fa714bb9b8b0c592ebae7309bf75ccc
remote:  !
remote:  ! We have detected that you have triggered a build from source code with version 58ad70f97fa714bb9b8b0c592ebae7309bf75ccc
remote:  ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote:  !
remote:  ! If you are developing on a branch and deploying via git you must run:
remote:  !
remote:  !     git push heroku <branchname>:main
remote:  !
remote:  ! This article goes into details on the behavior:
remote:  !   https://devcenter.heroku.com/articles/duplicate-build-version
remote: 
remote: Verifying deploy...
remote: 
remote: !	Push rejected to infra-introduction-tn.
remote: 
To https://git.heroku.com/infra-introduction-tn.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/infra-introduction-tn.git'
```
下記のログをよく確認。
```console
remote: -----> Installing dependencies using bundler 2.3.10
remote:        Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote:        Your bundle only supports platforms ["arm64-darwin-21"] but your local platform
remote:        is x86_64-linux. Add the current platform to the lockfile with
remote:        `bundle lock --add-platform x86_64-linux` and try again.
remote:        Bundler Output: Your bundle only supports platforms ["arm64-darwin-21"] but your local platform
remote:        is x86_64-linux. Add the current platform to the lockfile with
remote:        `bundle lock --add-platform x86_64-linux` and try again.
```
bundleがサポートしているプラットホームがローカルと異なっているとのこと。
`bundle lock --add-platform x86_64-linux`を行なってみろとのこと。
```console
% bundle lock --add-platform x86_64-linux
# ログの指示通りに行う。
% git add .
% git commit
# 変更箇所をコミットする。
% git push heroku app_name
```
上記の流れでエラー解消。