Change envrc to .env

[gauravgahlot]

Description

The setup scripts in tinkerbell/tink are different from that of tinkerbell/sandbox.

Why is this needed

Fixes: #481

[codecov]

Codecov Report

Merging #483 (a5266c9) into master (a56e5cf) will not change coverage.
The diff coverage is n/a.

❗ Current head a5266c9 differs from pull request most recent head c03a265. Consider uploading reports for the commit c03a265 to get more accurate results

@@           Coverage Diff           @@
##           master     #483   +/-   ##
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  Coverage   32.09%   32.09%           
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  Files          44       44           
  Lines        3103     3103           
=======================================
  Hits          996      996           
  Misses       2017     2017           
  Partials       90       90           

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[thebsdbox]

/LGTM although I guess it's confusing that we have a generate-envrc.sh that doesn't generate anenvrc 😂

[gauravgahlot]

/LGTM although I guess it's confusing that we have a generate-envrc.sh that doesn't generate anenvrc

Surely 😄 I will update it.

[thebsdbox]

Thanks for sanitising these across the board.