fix(build): rm NODE_ENV var

[kahboom]

This PR removes NODE_ENV from being set from the Dockerfile, which is causing Konflux builds to fail because we are now referencing a dev dependency in next.config.js, which we don't get installed because NODE_ENV=production.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.96%. Comparing base (009afdf) to head (32869b9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #45   +/-   ##
=======================================
  Coverage   58.96%   58.96%           
=======================================
  Files          13       13           
  Lines        1511     1511           
  Branches       37       37           
=======================================
  Hits          891      891           
+ Misses        620      619    -1     
- Partials        0        1    +1     

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[JasonPowr]

/lgtm thanks Rachel :)