feat: explicit binding to environment variables

[kzrnm]

Arguments and environment variables are automatically and forcibly bound, with no way to bind them manually (or to opt out).
If environment variables could be bound manually, issues like #748 and #745 could likely be avoided in some cases.

[hramezani]

Thanks @kzrnm for the issue.

I didn't get the idea of this issue.

Could be related to #714