chore: add .env.example file and update .gitignore to include it#3

xn1cklas wants to merge 2 commits intoshadcn-ui:mainshadcn-ui/alpine-registry:mainfrom

xn1cklas:fix(root)--add-env-examplexn1cklas/alpine-registry:fix(root)--add-env-exampleCopy head branch name to clipboard