can .gitignore default be added to install please?

can `.gitignore` default be added to skeleton please?

Here's what I went with:

```
# macOS system files
.DS_Store
.AppleDouble
.LSOverride

# Node.js
node_modules/
npm-debug.log
yarn-error.log

# Environment variables
.env
.env.local
.env.*.local
```