`curl error 28 while downloading https://repo.packagist.org/packages.json` でLaravelインストールできない

こちらに沿って環境構築をしていた

やりたいこと

Laravelをインストールする

発生した問題

create project できない

root@6d7f8f27a943:/data# composer create-project --prefer-dist "laravel/laravel" .
Creating a "laravel/laravel" project at "./"


  [Composer\Downloader\TransportException]
  curl error 28 while downloading https://repo.packagist.org/packages.json: Operation timed out after 10004 milliseconds with 0 out of 0 bytes received


create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--add-repository] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--remove-vcs] [--no-install] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--ask] [--] [<package>] [<directory>] [<version>]

対応

composer diagnoseというトラブルシューティング用のコマンドがあるのでたたいてみたところ

root@6d7f8f27a943:/data# composer diagnose
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com rate limit: OK
Checking disk free space: OK
Checking pubkeys: FAIL
Missing pubkey for tags verification
Missing pubkey for dev verification
Run composer self-update --update-keys to set them up
Checking composer version: You are not running the latest stable version, run `composer self-update` to update (2.2.22 => 2.6.6)
Composer version: 2.2.22
PHP version: 8.1.20
PHP binary path: /usr/local/bin/php
OpenSSL version: OpenSSL 1.1.1n  15 Mar 2022
cURL version: 7.64.0 libz 1.2.11 ssl OpenSSL/1.1.1n
zip: extension present, unzip present, 7-Zip not available

なんかFAILになっている.

Checking pubkeys: FAIL
Missing pubkey for tags verification
Missing pubkey for dev verification
Run composer self-update --update-keys to set them up

指示に従ってcomposer self-updateを実行

root@6d7f8f27a943:/data# composer self-update
Upgrading to version 2.6.6 (stable channel).

Use composer self-update --rollback to return to version 2.2.22

そして、再度create project してみる

root@6d7f8f27a943:/data# composer create-project --prefer-dist "laravel/laravel" .
Creating a "laravel/laravel" project at "./"
Installing laravel/laravel (v10.3.2)
  - Downloading laravel/laravel (v10.3.2)
  - Installing laravel/laravel (v10.3.2): Extracting archive
  ...
  ...
  ...

無事 create project できた