Add OPENCLIMATE_API_URL env var and use in API service

[lemilonkh]

Only set for the dev version for now

[github-actions]

LCOV of commit 96d9b0d during Push Web app to GHCR and deploy to EKS #829

Summary coverage rate:
  lines......: 61.7% (5663 of 9179 lines)
  functions..: 86.9% (245 of 282 functions)
  branches...: 88.8% (358 of 403 branches)

Files changed coverage rate: n/a

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.23%. Comparing base (b639346) to head (96d9b0d).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #369   +/-   ##
========================================
  Coverage    61.23%   61.23%           
========================================
  Files           61       61           
  Lines         9179     9179           
  Branches        89       89           
========================================
  Hits          5621     5621           
  Misses        3553     3553           
  Partials         5        5           

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