Ignore all dotfiles with a .env prefix by default for new projects

[kellenmace]

Describe the problem

When a developer runs npm init svelte@next to create a new app and selects either the demo or skeleton project, the codebase generated for them contains a .gitignore file that will ignore a file that is named .env, but will not ignore env files with other names, such as the commonly used .env.local.

This makes it easy for developers to add their environment variables in a .env.local file, work on their project, then accidentally commit all the files for their project to git without realizing that their .env.local (and the potentially sensitive API keys therein) was included in the commit.

Describe the proposed solution

Add a .env.* line to the .gitignore files of the create-svelte package templates. This way, all files with a ".env." prefix will be git ignored by default, including .env.local.

Alternatives considered

n/a

Importance

nice to have

Additional Information

n/a