Ignore .env file in gitignore

[Xavier Chanthavong]

Is your feature request related to a problem? Please describe.
The .env file will contain the api-key for production applications and should be ignored by default.

Describe the solution you'd like
Add ".env" to .gitignore file.

Describe alternatives you've considered
Not ignoring the file, however it's better to be secure by default.

Additional context
Add any other context or screenshots about the feature request here.