feat: Expose dotenv override flag

[atomicus]

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe it

dotenv provides a flag to enforce priority of .env over PROCESS
motdotla/dotenv#199
https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md#1410-2022-01-17

Describe the solution you'd like

Add override parameter to dotenv config interface

Teachability, documentation, adoption, migration strategy

No response

What is the motivation / use case for changing the behavior?

override - environemntal variables set in .env files will override a process one

[kamilmysliwiec]

Would you like to create a PR for this issue?

[AlexNguetcha]

I'd like to work on this! I'll prepare a PR to expose the override flag from dotenv in the ConfigModuleOptions.

[atomicus]

@AlexNguetcha I've you've got a minute to do it, go for it. If might not have a time for it for next few days.

[AlexNguetcha]

I have opened a PR here #2266.

[kamilmysliwiec]

Let's track this here #2266