chore: update pnpm ENV variables in Dockerfile

[sebastijankuzner]

Summary

Checklist

• Ready to be merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.99%. Comparing base (a0711c8) to head (0a9ed2e).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1293      +/-   ##
===========================================
+ Coverage    56.71%   56.99%   +0.27%     
===========================================
  Files         1123     1126       +3     
  Lines        64897    65327     +430     
  Branches      1781     1858      +77     
===========================================
+ Hits         36808    37232     +424     
- Misses       27859    27863       +4     
- Partials       230      232       +2     

Flag	Coverage Δ
contracts	98.60% <ø> (?)
packages	56.71% <ø> (ø)

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