[BUG]: rspec tests fail in fresh virtual machine dev environments

[jimmyli97]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Tests fail when running in Codespaces/VSCode Dev Container after install because Chrome is not installed and environment variable DOCKER is not set.

Related to #3829

Expected Behavior

All tests should pass

Steps To Reproduce

Codespaces

1. Open the Github Codespaces link in README.md
2. Choose "Create new codespace"
3. After installation, in VSCode terminal, run bundle exec rspec

Dev Container

1. install Dev Container add-on in VSCode
2. open project folder as Dev Container in VSCode
3. After installation, in VSCode terminal, run bundle exec rspec

Environment

No response

Criteria for Completion

• All tests should pass when running bundle exec rspec after starting a fresh Codespaces or Dev Container environment

Anything else?

No response

Code of Conduct

• I've read the Code of Conduct and understand my responsibilities as a member of the Ruby for Good community